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Centers for Disease Control and Prevention | m.d..common cdc job titles include engineer entomologist epidemiologist biologist physician veterinarian behavioral scientist nurse medical technologist economist public health advisor health communicator toxicologist chemist computer scientist statistician.the cdc also operates number notable training fellowship programs including indicated below.epidemic intelligence service eis epidemic intelligence service eis composed bootsontheground disease detectives investigate public health problems domestically globally.called upon governmental body eis officers may embark shortterm epidemiological assistance assignments epiaids provide technical expertise containing investigating disease outbreaks.eis program model international field epidemiology training program.public health associates program cdc also operates public health associate program phap twoyear paid fellowship recent college graduates work public health agencies united states. |
Centers for Disease Control and Prevention | phap founded currently associates states.leadership director cdc senior executive service position may filled either career employee political appointment require senate confirmation latter method typically used.director serves pleasure president may fired time.cdc director concurrently serves administrator agency toxic substances disease registry.twenty directors served cdc predecessor agencies including three served trump administration including anne schuchat twice served acting director three served carter administration including one acting director shown here.two served bill clinton one nixon ford terms.louis l. williams jr. md –mark d. hollis scd –raymond a. vonderlehr md –justin m. andrews scd –theodore j. bauer md –robert j. anderson md mph –clarence a. smith md mph –james l. goddard md mph –david j. sencer md mph –william h. foege md mph –james o. mason md mph ph.d –william l. roper md mph –david satcher md phd –jeffrey p. koplan md mph –julie gerberding md mph –thomas r. frieden md mph – jan anne schuchat md radm usphs acting jan–july brenda fitzgerald md july – jan anne schuchat md acting jan–mar robert r. redfield md march –jan rochelle walensky md mph jan –present datasets survey systems cdc scientific data surveillance health statistics laboratory information.behavioral risk factor surveillance system brfss worlds largest ongoing telephone healthsurvey system.mortality medical data system.abortion statistics united statescdc wonder wideranging online data epidemiologic researchdata systems national center health statistics areas focus communicable diseases cdcs programs address diseases health threats conditions major causes death disease disability. |
Centers for Disease Control and Prevention | cdcs website information various infectious noninfectious diseases including smallpox measles others.influenza cdc targets transmission influenza including hn swine flu launched websites educate people hygiene.division select agents toxins within division two programs federal select agent program fsap import permit program.fsap run jointly office within u.s. department agriculture regulating agents cause disease humans animals plants.import permit program regulates importation infectious biological materials.the cdc runs program protects public rare dangerous substances anthrax ebola virus. |
Centers for Disease Control and Prevention | program called federal select agent program calls inspections labs u.s. work dangerous pathogens.during ebola outbreak west africa cdc helped coordinate return two infected american aid workers treatment emory university hospital home special unit handle highly infectious diseases.as response ebola outbreak congress passed continuing appropriations resolution allocating towards cdcs efforts fight virus.noncommunicable diseases cdc also works noncommunicable diseases including chronic diseases caused obesity physical inactivity tobaccouse.work division cancer prevention control led lisa c. richardson also within remit.antibiotic resistance cdc implemented national action plan combating antibiotic resistant bacteria measure spread antibiotic resistance united states.initiative budget million includes development antibiotic resistance lab network. |
Centers for Disease Control and Prevention | global health globally cdc works organizations address global health challenges contain disease threats source.work many international organizations world health organization well ministries health groups front lines outbreaks.agency maintains staff countries including u.s. countries operate.agencys global divisions include division global hiv tb dght division parasitic diseases malaria dpdm division global health protection dghp global immunization division gid.the cdc integral working implement international health regulations ihr agreement countries prevent control report international spread disease initiatives including global disease detection program gdd.the cdc also lead implementer key u.s. global health initiatives presidents emergency plan aids relief pepfar presidents malaria initiative.travelers health cdc collects publishes health information travelers comprehensive book cdc health information international travel commonly known yellow book. |
Centers for Disease Control and Prevention | book available online print new edition every year includes current travel health guidelines vaccine recommendations information specific travel destinations.cdc also issues travel health notices website consisting three levelswatch level practice usual precautionsalert level practice enhanced precautionswarning level avoid nonessential travel vaccine safety cdc monitors safety vaccines u.s. via vaccine adverse event reporting system vaers national vaccine safety surveillance program run cdc fda.vaers detects possible safety issues u.s. vaccines collecting information adverse events possible side effects health problems vaccination.cdcs safety information vaccine page provides list latest safety information side effects answers common questions cdc recommended vaccines.foundation cdc foundation operates independently cdc private nonprofit c organization incorporated state georgia. |
Centers for Disease Control and Prevention | creation foundation authorized section f public health service act support mission cdc partnership private sector including organizations foundations businesses educational groups individuals.controversies tuskegee study untreated syphilis black men years cdc direct oversight tuskegee syphilis experiment.study lasted group black men nearly syphilis studied learn disease.disease left untreated men given informed consent serve research subjects.tuskegee study initiated public health service cdc taking tuskegee health benefit program . |
Centers for Disease Control and Prevention | gun violence area partisan dispute related cdc funding studying firearms effectiveness.although cdc one first agencies study gun violence public health issue dickey amendment passed support national rifle association states none funds available injury prevention control centers disease control prevention may used advocate promote gun control.advocates gun control oppose amendment tried overturn it.looking history passage dickey amendment mark l. rosenberg five cdc colleagues founded cdcs national center injury prevention control annual budget approximately .focused identifying causes firearm deaths methods prevent them.first report published new england journal medicine entitled guns risk factor homicide home reported mere presence gun home increased risk firearmrelated death . |
Centers for Disease Control and Prevention | percent suicide fivefold—a huge increase.response nra launched campaign shut injury center.two conservative progun groups doctors responsible gun ownership doctors integrity policy research joined progun effort politicians also supported progun initiative.jay dickey r arkansas introduced dickey amendment statement stating none funds available injury prevention control centers disease control prevention may used advocate promote gun control rider.appropriations bill. |
Centers for Disease Control and Prevention | congress redirected money gun research study traumatic brain injury.david satcher cdc head advocated firearms research.dozen public health insiders including current former cdc senior leaders told trace interviewers cdc senior leaders took cautious stance interpretation dickey amendment could afraid political personal retribution.rosenberg told trace right nothing stopping addressing lifeanddeath national problemin american medical association american psychological association american academy pediatrics sent letter leaders senate appropriations committee asking support least million within centers disease control prevention cdc fy along sufficient new taxes national institutes health support research causes prevention violence.furthermore urge members oppose efforts reduce eliminate condition cdc funding related violence prevention research. |
Centers for Disease Control and Prevention | congress maintained ban subsequent budgets.covid first confirmed case covid discovered u.s. january .widespread covid testing united states effectively stalled february federal officials revised faulty cdc test days afterward food drug administration began loosening rules restricted labs developing tests.february cdcs early coronavirus test malfunctioned nationwide cdc director robert r. redfield reassured fellow officials white house coronavirus task force problem would quickly solved according white house officials.took three weeks sort failed test kits may contaminated processing cdc lab. |
Centers for Disease Control and Prevention | later investigations fda department health human services found cdc violated protocols developing tests.november npr reported internal review document obtained revealed cdc aware first batch tests issued early january chance wrong percent time released anyway.in may atlantic reported cdc conflating results two different types coronavirus tests — tests diagnose current coronavirus infections tests measure whether someone ever virus.magazine said distorted several important metrics provided country inaccurate picture state pandemic overstated countrys testing ability.in july trump administration ordered hospitals bypass cdc instead send covid patient information database department health human services.health experts opposed order warned data might become politicized withheld public.july cdc alarmed health care groups temporarily removing covid dashboards website. |
Centers for Disease Control and Prevention | restored data day later.in august cdc recommended people showing covid symptoms need testing.new guidelines alarmed many public health experts.guidelines crafted white house coronavirus task force without signoff anthony fauci nih.objections experts cdc went unheard.officials said cdc document july arguing importance reopening schools also crafted outside cdc. |
Centers for Disease Control and Prevention | august chief staff kyle mcgowan deputy amanda campbell resigned agency.testing guidelines reversed september public controversy.in september cdc drafted order requiring masks public transportation united states white house coronavirus task force blocked order refusing discuss according two federal health officials.in october disclosed white house advisers repeatedly altered writings cdc scientists covid including recommendations church choirs social distancing bars restaurants summaries publichealth reports.in lead thanksgiving press conference november cdc advised americans travel holiday saying requirement.recommendation american public consider.white house coronavirus task force first public briefing months date travel mentioned.controversy morbidity mortality weekly report pandemic cdc morbidity mortality weekly report mmwr came pressure political appointees department health human services hhs modify reporting conflict trump saying pandemic. |
Centers for Disease Control and Prevention | starting june michael caputo hhs assistant secretary public affairs chief advisor paul alexander tried delay suppress change retroactively edit mmr releases effectiveness potential treatments covid transmissibility virus issues president taken public stance.alexander tried unsuccessfully get personal approval issues mmwr went out.caputo claimed oversight necessary mmwr reports tainted political content demanded know political leanings scientists reported hydroxychloroquine little benefit treatment trump saying opposite.emails alexander accused cdc scientists attempting hurt president writing hit pieces administration.october emails obtained politico showed alexander requested multiple alterations report. |
Centers for Disease Control and Prevention | published alterations included title changed children adolescents young adults persons.one current two former cdc officials reviewed email exchanges said troubled intervention alter scientific reports viewed untouchable prior trump administration appeared minimize risks coronavirus children making report’s focus children less clear.eroding trust cdc result covid controversies poll conducted september found nearly americans trusted cdc decrease percent april .another poll showed even larger drop trust results dropping percentage points.trustworthiness eroded information disseminates. |
Centers for Disease Control and Prevention | diminishing level trust cdc information releases also incited vaccine hesitancy result percent americans said would somewhat extremely likely get vaccine.in september amid accusations faltering image cdc agencys leadership called question.former acting director cdc richard besser said dr. redfield “i find concerning cdc director outspoken instances clear political interference interpretation science.” addition mark rosenberg first director cdc’s national center injury prevention control also questioned redfields leadership lack defense science.historically cdc political agency however covid pandemic specifically trump administrations handling pandemic resulted dangerous shift according previous cdc director others.four previous directors claim agencys voice muted political reasons.politicization agency continued biden administration covid guidance contradicted state guidance agency criticized cdcs credibility eroding.in cdc leadership biden administration received criticism mixed messaging surrounding covid vaccines maskwearing guidance state pandemic.the cdc criticized shortening quarantine times lobbying airline companies association flight attendants blasting decision forcing staff potentially unsafe work environment.publications cdc publicationsstate cdc reportcdc programs briefmorbidity mortality weekly reportemerging infectious diseases monthly journalpreventing chronic diseasevital statistics popular culture zombie apocalypse campaign may centers disease control preventions blog published article instructing public prepare zombie invasion. |
Centers for Disease Control and Prevention | article claim scenario possible use popular culture appeal means urging citizens prepare potential hazards earthquakes tornadoes floods.according david daigle associate director communications public health preparedness response idea arose team discussing upcoming hurricaneinformation campaign daigle mused say pretty much things every year way wonder many people paying attention.socialmedia employee mentioned subject zombies come lot twitter tweeting fukushima daiichi nuclear disaster radiation.team realized campaign like would likely reach different audience one normally pays attention hurricanepreparedness warnings went work zombie campaign launching right hurricane season began.whole idea youre prepared zombie apocalypse youre prepared pretty much anything said daigle.once blog article posted cdc announced open contest youtube submissions creative effective videos covering preparedness zombie apocalypse apocalypse kind judged cdc zombie task force.submissions open october . |
Centers for Disease Control and Prevention | also released zombiethemed graphic novella available website.zombiethemed educational materials teachers available site.see also u.s. consumer product safety commissiongun violence united stateshaddon matrixhome safety councillist national public health agenciesnational highway traffic safety administrationnational institute occupational safety health references citations sources reading editorial may .reviving us cdc.lancet. |
Centers for Disease Control and Prevention | .doi.s.pmc .pmid .external links official websitecdc federal registercdcwide activities program support account usaspending.govcdc online newsroomcdc public health image librarycdc global communications centercdc emerging infectious diseases laboratory – atlanta georgiacdc wonder online databases.vaccine safety monitoring systems methods cdc slide deck presented october advisory committee immunization practices acip meeting |
Gun control | jurisdictions regulate access firearms typically restrict access certain categories firearms restrict categories persons granted license access firearm.countries united states gun control may legislated either federal level local state level.terminology context gun control refers domestic regulation firearm manufacture trade possession use transport specifically regard class weapons referred small arms revolvers selfloading pistols rifles carbines assault rifles submachine guns light machine guns.usage term gun control sometimes politicized.favor legislation instead prefer use terms gunviolence prevention gun safety firearms regulation illegal guns criminal access guns.in estimated globally million small arms hands civilians law enforcement agencies armed forces.firearms million held civilians. |
Gun control | u.s. civilians account million total.million controlled state military forces.law enforcement agencies million small arms.nonstate armed groups .million firearms. |
Gun control | finally gang members hold million small arms.together small arms arsenals nonstate armed groups gangs account .global total.regulation civilian firearms barring exceptions countries world allow civilians purchase firearms subject certain restrictions.survey countries five continents found major distinction different national regimes firearm regulation whether civilian gun ownership seen right privilege. |
Gun control | study concluded united states yemen distinct countries surveyed viewing firearm ownership basic right civilians permissive regimes civilian gun ownership.remaining countries included sample civilian firearm ownership considered privilege legislation governing possession firearms correspondingly restrictive.international regional civilian firearm regulation international regional level diplomatic attention tended focus crossborder illegal trade small arms area particular concern rather regulation civilianheld firearms.mids however united nations economic social council ecosoc adopted series resolutions relating civilian ownership small arms.called exchange data national systems firearm regulation initiation international study issue. |
Gun control | july ecosoc issued resolution underlined responsibility un member states competently regulate civilian ownership small arms urged ensure regulatory frameworks encompassed following aspects firearm safety storage penalties unlawful possession misuse firearms licensing system prevent undesirable persons owning firearms exemption criminal liability promote surrender citizens illegal unsafe unwanted guns recordkeeping system track civilian firearms.in un published study based member state survey data titled united nations international study firearm regulation updated .study meant initiate establishment database civilian firearm regulations would run centre international crime prevention located vienna.report national systems civilian firearm regulation every two years.plans never reached fruition unled efforts establish international norms regulation civilianheld firearms stymied.responding pressure u.s. government mention regulation civilian ownership small arms removed draft proposals un programme action small arms.although issue longer part un policy debate since eight regional agreements involving countries concerning aspects civilian firearm possession. |
Gun control | bamako declaration adopted bamako mali december representatives member states organisation african unity oau.provisions declaration recommend signatories would establish illegal possession small arms light weapons criminal offence national law respective countries.studies high rates gun mortality injury often cited primary impetus gun control policies.national research council critical review found strong conclusions warranted current research state knowledge generally poor.result scarcity relevant data gun control one fraught topics american politics scholars remain deadlocked variety issues. |
Gun control | notably since dickey amendment first inserted federal spending bill united states centers disease control prevention prohibited using federal funding advocate promote gun control thwarting gun violence research agency time.funding provisions author said overinterpretation amendment still chilling effect effectively halting federally funded firearmrelated research.since amendment cdc continued research gun violence publish studies although funding research fallen since according mayors illegal guns.according spokesman cdc limited funding produced comprehensive study aimed reducing gun violence since .general review found suicide rates generally declined gun control laws enacted concluded findings support gun control measures strategy reducing suicide rates. |
Gun control | review found laws banning people restraining orders due domestic violence convictions accessing guns associated reductions intimate partner homicide.another review identified studies regarding restrictive gun laws found implementation multiple laws simultaneously associated decrease gunrelated deaths.according un study identifying number methodological problems stated notwithstanding challenges significant body literature tends suggest firearm availability predominantly represents risk factor rather protective factor homicide.particular number quantitative studies tend towards demonstrating firearm prevalence–homicide association.united states crosssectional studies crosssectional study u.s. states found six states strictest gun laws according national rifle association suicide rates approximately people lower states states suicide rates people lower states least restrictive gun laws.study published american journal preventive medicine looked restrictiveness gun laws suicide rates men women u.s. states found states whose gun laws restrictive lower suicide rates among sexes. |
Gun control | another study found effect state gun laws gunrelated homicides limited.study looked states u.s. district columbia found gun laws associated reductions firearm homicide suicide shallissue concealed carry law may associated increased firearm homicide rates.study found firearm regulation laws united states significant deterrent effect male suicide.a study found united states higher number firearm laws state associated lower rate firearm fatalities state.study published lancet found laws studied time period examined – nine associated reduced firearm mortality including homicide suicide nine associated increased mortality seven inconclusive association.three laws strongly associated reduced firearm mortality laws requiring universal background checks background checks ammunition sales identification guns. |
Gun control | accompanying commentary david hemenway noted study multiple limitations controlling factors may influence gunrelated deaths aside gun control laws use explanatory variables analysis.other studies comparing gun control laws different u.s. states include study found united states stricter state firearm legislation associated lower discharge rates nonfatal gun injuries.study also looked united states found children living states stricter gun laws safer.another study looking specifically suicide rates united states found four handgun laws examined waiting periods universal background checks gun locks open carrying regulations associated significantly lower firearm suicide rates proportion suicides resulting firearms.study also found four laws except waitingperiod one associated reductions overall suicide rate.another study published year found states permit purchase registration andor license laws handguns lower overall suicide rates well lower firearm suicide rates.study found states required licensing inspections gun dealers tended lower rates gun homicides. |
Gun control | another study published year analyzing panel data states found stricter gun laws may modestly reduce gun deaths.study found u.s. military veterans tend commit suicide guns often general population thereby possibly increasing state suicide rates tendency veterans live states without handgun legislation may exacerbate phenomenon.california exceptionally strict gun sales laws study found also oldest guns recovered crimes states u.s. study concluded findings suggest restrictive gun sales laws gun dealer regulations make difficult criminals acquire new guns first purchased retail outlets.another study found stricter state gun laws united states reduced suicide rates.another study found u.s. states lenient gun control laws gunrelated child injury hospital admissions states stricter gun control laws.study found suicide rates declined states universal background check mandatory waiting period laws states without laws. |
Gun control | another study found states without universal background check andor waiting period laws steeper increases suicide rates states laws.third study found waiting period laws delay purchase firearms days reduce gun homicides roughly .study economic journal found mandatory handgun purchase delays reduced firearm related suicides percent statistically significant increase nonfirearm suicides associated statistically significant changes homicide rates.another study showed laws banning gun possession people subject intimate partner violence restraining orders requiring people give guns associated lower intimate partner homicide rates.study found firearm purchase delay laws reduced homicide – authors suggested driven reductions gun purchases impulsive customers. |
Gun control | reviews review published studies gun control released october centers disease control prevention unable determine statistically significant effect resulting laws although authors suggest study may provide conclusive information noted insufficient evidence determine effectiveness interpreted evidence ineffectiveness.in daniel webster garen wintemute reviewed studies examining effectiveness gun laws aimed keeping guns hands highrisk individuals united states.found laws prohibiting gun possession people domestic violence restraining orders convicted violent misdemeanors associated lower violence rates laws establishing procedures see people prohibited owning gun laws.also found multiple gun regulations intended prevent prohibited individuals obtaining guns rigorous permittopurchase laws comprehensive background checks negatively associated diversion guns criminals.a systematic review found restrictive gun licensing laws associated lower gun injury rates concealed carry laws significantly associated rates injuries.another systematic review found stricter gun laws associated lower gun homicide rates association especially strong background check permittopurchase laws.studies individual laws studies examined trends firearmrelated deaths gun control laws either enacted repealed. |
Gun control | study journal american medical association found evidence child access prevention laws associated modest reduction suicide rates among youth aged years.two studies found permittopurchase law passed connecticut associated reduction firearm suicides homicides.one studies also found repeal missouris permittopurchase law associated .increase firearm suicide rates study research team found repeal law associated increase homicide rates.study designed assess effectiveness brady handgun violence prevention act found law associated reductions overall homicide suicide rates associated reduction firearm suicide rate among individuals aged older. |
Gun control | study looked washington d.c.s firearms control regulations act banned residents owning guns except certain shotguns sporting rifles also required unloaded disassembled stored trigger lock owners homes.study found laws enactment associated prompt decline homicides suicides firearms district columbia.study reanalyzed data reached significantly different conclusion effectiveness law.studies debate kleck patterson analyzed impact major types gun control laws every major type guninvolved crime violence including suicide u.s. cities found gun laws generally significant effect violent crime rates suicide rates.similarly study found gun control laws small influence rate gun deaths u.s. states compared socioeconomic variables like poverty unemployment.philosophy professor michael huemer argues gun control may morally wrong even outcomes would positive individuals prima facie right gun selfdefense recreation.rand corporation study demonstrates background checks may decrease suicides violent crime childaccess prevention laws may decrease number suicides unintentional injuries deaths minimum age requirements may decrease suicides prohibitions associated mental illness may decrease suicides violent crimes. |
Gun control | hand concealedcarry laws may increase violent crimes suicides standyourground laws may increase violent crime.bans sale assault weapons highcapacity magazines may increase sale price items.august article entitled gun control really works published business insider looks dozen studies centers disease control prevention journal american medical association rand corporation journal preventive medicine everytown gun safety johns hopkins university others.conclude mirroring firearms regulations switzerland banning sale new assault weapons denying concealedcarry licenses individuals prohibiting firearm sales people convicted multiple alcoholrelated offenses decrease gunrelated deaths injuries.canada rifles shotguns relatively easy obtain handguns semiautomatic rifles restricted.with respect criminal law amendment act gun control law passed canada studies found ineffective reducing homicide robbery rates. |
Gun control | one study even found law may actually increased robberies involving firearms.study found law passed gun suicides decreased significantly proportion suicides committed country guns.study found law may impact suicide rates even controls social variables study research team concluded law may impact homicide rates least older victims.study found law came force suicide rates decreased time ontario evidence method substitution.study found decreases may partly due legislation.in canada implemented gun control law bill c. according study law passed firearmrelated suicides homicides well percentage suicides involving firearms declined significantly country. |
Gun control | study found law passed firearm suicides declined quebec among men acknowledged may represent causal relationship.canada promulgated canadian firearms act aimed ensuring guns stored safely.study found although firearm suicide rates declined quebec region abitibitémiscamingue law passed overall suicide rates not.study also found overall suicide rates change passage bill c. study reached similar conclusions regard entire quebec province study also found c seem increase rate firearm suicide rate declining.researchers criticized study looking short time period taking account fact regulations c implemented gradually.a study compared suicide rates vancouver british columbia canada metropolitan area gun control laws restrictive seattle washington area united states. |
Gun control | overall suicide rate essentially two locations suicide rate among year olds percent higher seattle vancouver.authors concluded restricting access handguns might expected reduce suicide rate persons years old but...it probably would reduce overall suicide rate.study looked provincial gun ownership rates associated suicide rates found significant correlations overall suicide rates.a study looked gun control passed canada found gun laws responsible percent drops homicides.study found homicide reduction effects canadian gun legislation remained even accounting sociodemographic economic factors associated homicide rates.a study looked gun control laws passed canada found evidence laws beneficial effect firearm homicide rates country.according study factors found associated homicide rates median age unemployment immigration rates percentage population lowincome bracket gini index income equality population per police officer incarceration rate.a study canadian gun control law firearms act reported little evidence law significantly reduced rates lethal gun violence women.on may deadly shootings nova scotia justin trudeaus liberal government banned kinds militarystyle semiautomatic rifles including popular ar variants. |
Gun control | ban enacted via order council.a study examining laws passed found significant changes overall homicide suicide rates following changes legislation.addition also found firearm ownership province correlated overall suicide rates province.australia gun control laws enacted australian state victoria times following mass shootings.study found context laws overall firearmrelated deaths especially suicides declined dramatically.study found preliminary evidence gun control legislation enacted queensland australia reduced suicide rates there.a study gun lobbyaffiliated researchers jeanine baker samara mcphedran found australia enacted national firearms agreement nfa gun control law gunrelated suicides may affected parameter appeared been. |
Gun control | another study led simon chapman found law enacted australia country went decade without mass shootings gunrelated deaths especially suicides declined dramatically.latter studies also criticized former using timeseries analysis despite fact according chapman et al.calculating mortality rates treating number time series ignores natural variability inherent counts make numerator rate.chapman et al.also said baker mcphedran used box–jenkins model inappropriately.a study looking effect nfa gunrelated deaths found law large effects reducing firearm homicide suicide rates although david hemenway criticized study using structural break test despite fact tests miss effects policies presence lags effect occurs several years. |
Gun control | another study published year found australias gun buyback program reduced gunrelated suicide rates almost nongun death rates significantly affected.research argued although gun suicide rates fell nfa enacted nfa may responsible decrease change social cultural attitudes may instead least partly responsible.chapman coauthored another study found nfa passed mass shootings country may gunrelated death rates declined quickly nfa it.study also found however nongun suicide homicide rates declined even quickly nfa leading authors conclude possible determine whether change firearm deaths attributed gun law reforms.countries study found evidence gun control laws passed austria reduced rates firearm suicide homicide country. |
Gun control | brazil disarmament laws passed gunrelated mortality declined relative previous year first decline observed decade.gunrelated hospitalizations also reversed previous trend decreasing ..study found gun control laws passed new zealand suicides committed guns declined significantly especially among youth.study however found overall suicide rates change significantly. |
Gun control | casecontrol study conducted new zealand found gun ownership significantly associated greater risk gun suicides suicides overall.a study looked effect policy adopted israeli defense forces restricted access guns among adolescents suicide rates found following policy change suicide rates decreased significantly .authors concluded results study illustrate ability relatively simple change policy major impact suicide rates.study showed military switzerland adopted army xxi reform restricted gun availability suicide rates – overall firearmrelated – decreased.another study looking four restrictive gun laws passed norway found two may reduced firearm mortality among men evidence inconclusive respect laws studied.study found south africas firearm control act passed homicide rates country declined concluded stricter gun control mediated fca accounted significant decrease homicide overall firearm homicide particular study period –. |
Gun control | study found ban carrying guns colombia associated reductions homicide rates two cities country namely cali bogotá.see also concealed carrygun violencelist mostproduced firearmsright keep bear arms international game lawhunting licenselist countries gun ownershipoverview gun laws nation united states assault weapons legislation united statesfederal assault weapons bangun control act gun control sandy hook elementary school shootinggun politics united statesgun show loopholepublic opinion gun control united states united states gun violence protests notes references bibliography reading rakoff jed s. last kind review john paul stevens making justice reflections first years little brown pp.new york review books vol.lxvi no.september pp. |
Gun control | .john paul stevens throwback postwar liberal republican u.s. supreme court appointees questioned validity doctrine sovereign immunity holds cannot sue state federal government agency officers employees wrong may committed unless state federal government consents sued p. propriety increasing resistance u.s. supreme court meaningful forms gun control p. constitutionality death penalty... incontrovertible evidence innocent people sentenced death.pp..external links gun control curliegunpolicy.org national groups gun control australia – supporting gun control australiacoalition gun control – canadastop gun caravan – japangun free south africacoalition stop gun violence – u.s.brady campaign prevent gun violence – u.s.americans responsible solutions – u.s. |
Climate change | previous periods climate change current changes distinctly rapid due natural causes.instead caused emission greenhouse gases mostly carbon dioxide co methane.burning fossil fuels energy use creates emissions.agriculture steelmaking cement production forest loss additional sources.greenhouse gases transparent sunlight allowing heat earths surface. |
Climate change | earth emits heat infrared radiation gases absorb trapping heat near earths surface.planet heats causes changes like loss sunlightreflecting snow cover amplifying global warming.on land temperatures risen twice fast global average.deserts expanding heat waves wildfires becoming common.increased warming arctic contributed melting permafrost glacial retreat sea ice loss.higher temperatures also causing intense storms weather extremes. |
Climate change | rapid environmental change mountains coral reefs arctic forcing many species relocate become extinct.climate change threatens people food water scarcity increased flooding extreme heat disease economic loss.human migration conflict result.world health organization calls climate change greatest threat global health st century.even efforts minimise future warming successful effects continue centuries. |
Climate change | include sea level rise warmer acidic oceans.many impacts already felt current level warming .°c.additional warming increase impacts may trigger tipping points melting greenland ice sheet.paris agreement nations collectively agreed keep warming well °c.however pledges made agreement global warming would still reach . |
Climate change | °c end century.limiting warming .°c require halving emissions achieving netzero emissions .making deep cuts emissions require switching away burning fossil fuels towards using electricity generated lowcarbon sources.includes phasing coalfired power plants vastly increasing use wind solar power switching electric vehicles switching heat pumps buildings taking measures conserve energy.carbon also removed atmosphere instance increasing forest cover. |
Climate change | communities may adapt climate change efforts like better coastline protection cannot avert risk severe widespread permanent impacts.terminology unclear whether warming increased greenhouse gases would dominate aerosolinduced cooling.scientists often used term inadvertent climate modification refer human impact climate.terms global warming climate change popularised.former refers increased surface warming latter describes full effect greenhouse gases climate. |
Climate change | global warming became popular term nasa climate scientist james hansen used testimony u.s. senate.term climate change increased popularity.global warming usually refers humaninduced warming earth system whereas climate change refer natural anthropogenic change.two terms often used interchangeably.various scientists politicians media figures adopted terms climate crisis climate emergency talk climate change global heating instead global warming.policy editorinchief guardian said included language editorial guidelines ensure scientifically precise also communicating clearly readers important issue. |
Climate change | oxford languages chose climate emergency word year defining situation urgent action required reduce halt climate change avoid potentially irreversible environmental damage resulting it.observed temperature rise multiple independent instrumental datasets show climate system warming.– decade warmed average .°c .–.°c compared preindustrial baseline –. |
Climate change | surface temperatures rising .°c per decade reaching temperature .°c preindustrial era.since number cold days nights decreased number warm days nights increased.there little net warming th century midth century.climate information period comes climate proxies trees ice cores. |
Climate change | thermometer records began provide global coverage around .historical patterns warming cooling like medieval climate anomaly little ice age occur time across different regions.temperatures may reached high lateth century limited set regions.prehistorical episodes global warming paleocene–eocene thermal maximum.however modern observed rise temperature co concentrations rapid even abrupt geophysical events earths history approach current rates.evidence warming air temperature measurements reinforced wide range observations. |
Climate change | increase frequency intensity heavy precipitation melting snow land ice increased atmospheric humidity.flora fauna also behaving manner consistent warming instance plants flowering earlier spring.another key indicator cooling upper atmosphere demonstrates greenhouse gases trapping heat near earths surface preventing radiating space.regions world warm differing rates.pattern independent greenhouse gases emitted gases persist long enough diffuse across planet.since preindustrial period average surface temperature land regions increased almost twice fast globalaverage surface temperature. |
Climate change | larger heat capacity oceans oceans lose heat evaporation.thermal energy global climate system grown brief pauses since least extra energy stored ocean.rest heated atmosphere melted ice warmed continents.the northern hemisphere north pole warmed much faster south pole southern hemisphere.northern hemisphere much land also seasonal snow cover sea ice.surfaces flip reflecting lot light dark ice melted start absorbing heat. |
Climate change | local black carbon deposits snow ice also contribute arctic warming.arctic temperatures increasing twice rate rest world.melting glaciers ice sheets arctic disrupts ocean circulation including weakened gulf stream changing climate.drivers recent temperature rise climate system experiences various cycles last years el niño–southern oscillation decades even centuries.changes caused imbalance energy external climate system always external earth. |
Climate change | examples external forcings include changes concentrations greenhouse gases solar luminosity volcanic eruptions variations earths orbit around sun.to determine human contribution climate change known internal climate variability natural external forcings need ruled out.key approach determine unique fingerprints potential causes compare fingerprints observed patterns climate change.example solar forcing ruled major cause.fingerprint would warming entire atmosphere.yet lower atmosphere warmed consistent greenhouse gas forcing. |
Climate change | attribution recent climate change shows main driver elevated greenhouse gases aerosols dampening effect.greenhouse gases earth absorbs sunlight radiates heat.greenhouse gases atmosphere absorb reemit infrared radiation slowing rate pass atmosphere escape space.industrial revolution naturallyoccurring amounts greenhouse gases caused air near surface °c warmer would absence.water vapour clouds biggest contributors greenhouse effect increase function temperature therefore feedbacks. |
Climate change | hand concentrations gases co tropospheric ozone cfcs nitrous oxide temperaturedependent therefore external forcings.human activity since industrial revolution mainly extracting burning fossil fuels coal oil natural gas increased amount greenhouse gases atmosphere resulting radiative imbalance.concentrations co methane increased respectively since .co levels higher time last million years.concentrations methane far higher last years.global anthropogenic greenhouse gas emissions excluding land use change equivalent billion tonnes co. emissions co methane nitrous oxide fluorinated gases.co emissions primarily come burning fossil fuels provide energy transport manufacturing heating electricity. |
Climate change | additional co emissions come deforestation industrial processes include co released chemical reactions making cement steel aluminum fertiliser.methane emissions come livestock manure rice cultivation landfills wastewater coal mining well oil gas extraction.nitrous oxide emissions largely come microbial decomposition fertiliser.despite contribution deforestation greenhouse gas emissions earths land surface particularly forests remain significant carbon sink co. natural processes carbon fixation soil photosynthesis offset greenhouse gas contributions deforestation.landsurface sink estimated remove annual global co emissions.ocean also serves significant carbon sink via twostep process. |
Climate change | first co dissolves surface water.afterwards oceans overturning circulation distributes deep oceans interior accumulates time part carbon cycle.last two decades worlds oceans absorbed emitted co. aerosols clouds air pollution form aerosols puts large burden human health also affects climate large scale.gradual reduction amount sunlight reaching earths surface observed phenomenon popularly known global dimming typically attributed aerosols biofuel fossil fuel burning.globally aerosols declining since meaning longer mask greenhouse gas warming much.aerosols scatter absorb solar radiation. |
Climate change | also indirect effects earths radiation budget.sulfate aerosols act cloud condensation nuclei lead clouds smaller cloud droplets.clouds reflect solar radiation efficiently clouds fewer larger droplets.also reduce growth raindrops makes clouds reflective incoming sunlight.indirect effects aerosols largest uncertainty radiative forcing.while aerosols typically limit global warming reflecting sunlight black carbon soot falls snow ice contribute global warming. |
Climate change | increase absorption sunlight also increases melting sealevel rise.limiting new black carbon deposits arctic could reduce global warming .°c .changes land surface humans change earths surface mainly create agricultural land.today agriculture takes earths land area forests uninhabitable glaciers deserts etc.. amount forested land continues decrease largely due conversion cropland tropics. |
Climate change | deforestation significant aspect land surface change affecting global warming.main causes deforestation permanent landuse change forest agricultural land producing products beef palm oil logging produce forestryforest products short term shifting cultivation wildfires .land use changes affect greenhouse gas emissions.type vegetation region affects local temperature.impacts much sunlight gets reflected back space albedo much heat lost evaporation.instance change dark forest grassland makes surface lighter causing reflect sunlight. |
Climate change | deforestation also affect temperatures modifying release chemical compounds influence clouds changing wind patterns.tropic temperate areas net effect produce significant warming latitudes closer poles gain albedo forest replaced snow cover leads cooling effect.globally effects estimated led slight cooling dominated increase surface albedo.solar volcanic activity physical climate models unable reproduce rapid warming observed recent decades taking account variations solar output volcanic activity.sun earths primary energy source changes incoming sunlight directly affect climate system. |
Climate change | solar irradiance measured directly satellites indirect measurements available early onwards.upward trend amount suns energy reaching earth.evidence greenhouse gases causing global warming comes measurements show warming lower atmosphere troposphere coupled cooling upper atmosphere stratosphere.solar variations responsible observed warming troposphere stratosphere would warm.explosive volcanic eruptions represent largest natural forcing industrial era.eruption sufficiently strong sulfur dioxide reaching stratosphere sunlight partially blocked couple years. |
Climate change | temperature signal lasts twice long.industrial era volcanic activity negligible impacts global temperature trends.presentday volcanic co emissions equivalent less current anthropogenic co emissions.climate change feedback response climate system initial forcing modified feedbacks increased selfreinforcing feedbacks reduced balancing feedbacks.main reinforcing feedbacks watervapour feedback ice–albedo feedback net effect clouds. |
Climate change | primary balancing mechanism radiative cooling earths surface gives heat space response rising temperature.addition temperature feedbacks feedbacks carbon cycle fertilizing effect co plant growth.uncertainty feedbacks major reason different climate models project different magnitudes warming given amount emissions.as air warmed greenhouse gases hold moisture.water vapour potent greenhouse gas heats atmosphere.cloud cover increases sunlight reflected back space cooling planet. |
Climate change | clouds become higher thinner act insulator reflecting heat back downwards warming planet.effect clouds largest source feedback uncertainty.another major feedback reduction snow cover sea ice arctic reduces reflectivity earths surface.suns energy absorbed regions contributing amplification arctic temperature changes.arctic amplification also melting permafrost releases methane co atmosphere.climate change also cause methane releases wetlands marine systems freshwater systems. |
Climate change | overall climate feedbacks expected become increasingly positive.around half humancaused co emissions absorbed land plants oceans.land elevated co extended growing season stimulated plant growth.climate change increases droughts heat waves inhibit plant growth makes uncertain whether carbon sink continue grow future.soils contain large quantities carbon may release heat up.co heat absorbed ocean acidifies circulation changes phytoplankton takes less carbon decreasing rate ocean absorbs atmospheric carbon. |
Climate change | overall higher co concentrations earth absorb reduced fraction emissions.future warming carbon budget climate model representation physical chemical biological processes affect climate system.models used calculate degree warming future emissions cause accounting strength climate feedbacks.models also include natural processes like changes earths orbit historical changes suns activity volcanic forcing.addition estimating future temperatures reproduce predict circulation oceans annual cycle seasons flows carbon land surface atmosphere.the physical realism models tested examining ability simulate contemporary past climates. |
Climate change | past models underestimated rate arctic shrinkage underestimated rate precipitation increase.sea level rise since underestimated older models recent models agree well observations.united statespublished national climate assessment notes climate models may still underestimating missing relevant feedback processes.a subset climate models add societal factors simple physical climate model.models simulate population economic growth energy use affect – interact – physical climate.information models produce scenarios future greenhouse gas emissions. |
Climate change | used input physical climate models generate climate change projections.scenarios emissions continue rise century others reduced emissions.emissions scenarios combined modelling carbon cycle predict atmospheric concentrations greenhouse gases might change future.according combined models atmospheric concentration co could low high ppm depending socioeconomic scenario mitigation scenario.the ipcc sixth assessment report projects global warming likely reach .°c . |
Climate change | °c late st century low ghg emissions scenario.intermediate scenario global warming would reach .°c .°c .°c . |
Climate change | °c high ghg emissions scenario.projections based climate models combination observations.the remaining carbon budget determined modelling carbon cycle climate sensitivity greenhouse gases.according ipcc global warming kept .°c twothirds chance emissions exceed gigatonnes co. corresponds years current emissions.high uncertainties budget. |
Climate change | instance may gigatonnes co smaller due methane release permafrost wetlands.however clear fossil fuel resources abundant shortages relied limit carbon emissions st century.impacts physical environment environmental effects climate change broad farreaching affecting oceans ice weather.changes may occur gradually rapidly.evidence effects comes studying climate change past modelling modern observations. |
Climate change | since droughts heat waves appeared simultaneously increasing frequency.extremely wet dry events within monsoon period increased india east asia.rainfall rate intensity hurricanes typhoons likely increasing.frequency tropical cyclones increased result climate change.however study review article published nature geoscience concluded geographic range tropical cyclones probably expand poleward response climate warming hadley circulation.global sea level rising consequence glacial melt melt ice sheets greenland antarctica thermal expansion. |
Climate change | rise increased time averaging .± .mm per year.st century ipcc projects high emissions scenario sea level could rise – cm.increased ocean warmth undermining threatening unplug antarctic glacier outlets risking large melt ice sheet possibility meter sea level rise high emissions.climate change led decades shrinking thinning arctic sea ice. |
Climate change | icefree summers expected rare .°c degrees warming set occur every three ten years warming level °c.higher atmospheric co concentrations led changes ocean chemistry.increase dissolved co causing oceans acidify.addition oxygen levels decreasing oxygen less soluble warmer water. |
Climate change | dead zones ocean regions little oxygen expanding too.tipping points longterm impacts greater amount global warming greater risk passing ‘tipping points’ thresholds beyond certain impacts longer avoided even temperatures reduced.example collapse west antarctic greenland ice sheets temperature rise .°c may commit ice sheets melt although time scale melt uncertain depends future warming.largescale changes could occur short time period collapse certain ocean currents. |
Climate change | particular concern shutdown atlantic meridional overturning circulation would trigger major climate changes north atlantic europe north america.the longterm effects climate change include ice melt ocean warming sea level rise ocean acidification.timescale centuries millennia magnitude climate change determined primarily anthropogenic co emissions.due cos long atmospheric lifetime.oceanic co uptake slow enough ocean acidification continue hundreds thousands years.emissions estimated prolonged current interglacial period least years. |
Climate change | sea level rise continue many centuries estimated rise .metres per degree celsius .ft°f years.nature wildlife recent warming driven many terrestrial freshwater species poleward towards higher altitudes.higher atmospheric co levels extended growing season resulted global greening. |
Climate change | however heatwaves drought reduced ecosystem productivity regions.future balance opposing effects unclear.climate change contributed expansion drier climate zones expansion deserts subtropics.size speed global warming making abrupt changes ecosystems likely.overall expected climate change result extinction many species.the oceans heated slowly land plants animals ocean migrated towards colder poles faster species land. |
Climate change | land heat waves ocean occur frequently due climate change harming wide range organisms corals kelp seabirds.ocean acidification makes harder organisms mussels barnacles corals produce shells skeletons heatwaves bleached coral reefs.harmful algal blooms enhanced climate change eutrophication lower oxygen levels disrupt food webs cause great loss marine life.coastal ecosystems particular stress.almost half global wetlands disappeared due climate change human impacts. |
Climate change | humans effects climate change humans detected worldwide.mostly due warming shifts precipitation.impacts observed continents ocean regions lowlatitude less developed areas facing greatest risk.continued warming potentially “severe pervasive irreversible impacts” people ecosystems.risks unevenly distributed generally greater disadvantaged people developing developed countries. |
Climate change | food health classified climate change greatest threat global health st century.extreme weather leads injury loss life crop failures undernutrition.various infectious diseases easily transmitted warmer climate dengue fever malaria.young children vulnerable food shortages.children older people vulnerable extreme heat. |
Climate change | world health organization estimated climate change would cause around additional deaths per year.assessed deaths heat exposure elderly people increases diarrhea malaria dengue coastal flooding childhood undernutrition.adult deaths projected yearly due reductions food availability quality.climate change affecting food security.caused reduction global yields maize wheat soybeans .future warming could reduce global yields major crops. |
Climate change | crop production probably negatively affected lowlatitude countries effects northern latitudes may positive negative.additional million people worldwide particularly lower incomes risk hunger consequence impacts.climate change also impacts fish populations.globally less available fished.regions dependent glacier water regions already dry small islands higher risk water stress due climate change. |
Climate change | livelihoods economic damages due climate change may severe chance disastrous tailrisk events.climate change likely already increased global economic inequality trend projected continue.severe impacts expected subsaharan africa southeast asia.world bank estimates climate change could drive million people poverty .current inequalities men women rich poor different ethnicities worsened due climate variability climate change. |
Climate change | expert elicitation concluded role climate change armed conflict small compared factors socioeconomic inequality state capabilities future warming bring increasing risks.lowlying islands coastal communities threatened sea level rise makes flooding common.sometimes land permanently lost sea.could lead statelessness people island nations maldives tuvalu.regions rise temperature humidity may severe humans adapt to.worstcase climate change models project almost onethird humanity might live extremely hot uninhabitable climates similar current climate found sahara. |
Climate change | factors drive environmental migration within countries.people expected displaced sea level rise extreme weather conflict increased competition natural resources.climate change may also increase vulnerability leading trapped populations able move due lack resources.responses mitigation climate change mitigated reducing greenhouse gas emissions enhancing sinks absorb greenhouse gases atmosphere.order limit global warming less . |
Climate change | °c high likelihood success global greenhouse gas emissions needs netzero °c target.requires farreaching systemic changes unprecedented scale energy land cities transport buildings industry.united nations environment programme estimates countries need triple pledges paris agreement within next decade limit global warming °c.even greater level reduction required meet .°c goal. |
Climate change | pledges made agreement october global warming would still chance reaching .°c range .–.°c end century.although single pathway limit global warming .°c scenarios strategies see major increase use renewable energy combination increased energy efficiency measures generate needed greenhouse gas reductions.reduce pressures ecosystems enhance carbon sequestration capabilities changes would also necessary agriculture forestry preventing deforestation restoring natural ecosystems reforestation.other approaches mitigating climate change higher level risk. |
Climate change | scenarios limit global warming .°c typically project largescale use carbon dioxide removal methods st century.concerns though overreliance technologies environmental impacts.solar radiation management srm also possible supplement deep reductions emissions.however srm would raise significant ethical legal issues risks poorly understood. |
Climate change | clean energy renewable energy key limiting climate change.fossil fuels accounted worlds energy .remaining share split nuclear power renewables including solar wind power bioenergy geothermal energy hydropower.mix projected change significantly next years.solar wind seen substantial growth progress last years. |
Climate change | solar panels onshore wind cheapest forms adding new power generation capacity countries.renewables represented new electricity generation installed nearly solar wind.meanwhile nuclear power share remains costs increasing.nuclear power generation several times expensive per megawatthour wind solar.to achieve carbon neutrality renewable energy would become dominant form electricity generation rising scenarios.use electricity heating transport would rise point electricity becomes largest form energy. |
Climate change | investment coal would eliminated coal use nearly phased .in transport emissions reduced fast switch electric vehicles.public transport active transport cycling walking also produce less co. shipping flying lowcarbon fuels used reduce emissions.heating would increasingly decarbonised technologies like heat pumps.there obstacles continued rapid growth renewables.solar wind power key challenge intermittency seasonal variability.traditionally hydro dams reservoirs conventional power plants used variable energy production low. |
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