id stringlengths 24 24 | title stringlengths 3 59 | context stringlengths 151 3.71k | question stringlengths 1 25.7k | answers dict |
|---|---|---|---|---|
56cfe88d234ae51400d9c073 | Solar_energy | Shuman built the world’s first solar thermal power station in Maadi, Egypt, between 1912 and 1913. Shuman’s plant used parabolic troughs to power a 45–52 kilowatts (60–70 hp) engine that pumped more than 22,000 litres (4,800 imp gal; 5,800 US gal) of water per minute from the Nile River to adjacent cotton fields. Altho... | Where was the first solar thermal power plant built? | {
"text": [
"Maadi, Egypt"
],
"answer_start": [
62
]
} |
56cfe88d234ae51400d9c074 | Solar_energy | Shuman built the world’s first solar thermal power station in Maadi, Egypt, between 1912 and 1913. Shuman’s plant used parabolic troughs to power a 45–52 kilowatts (60–70 hp) engine that pumped more than 22,000 litres (4,800 imp gal; 5,800 US gal) of water per minute from the Nile River to adjacent cotton fields. Altho... | What was used to power the plants engine? | {
"text": [
"parabolic troughs"
],
"answer_start": [
119
]
} |
56cfe88d234ae51400d9c075 | Solar_energy | Shuman built the world’s first solar thermal power station in Maadi, Egypt, between 1912 and 1913. Shuman’s plant used parabolic troughs to power a 45–52 kilowatts (60–70 hp) engine that pumped more than 22,000 litres (4,800 imp gal; 5,800 US gal) of water per minute from the Nile River to adjacent cotton fields. Altho... | From what river did the engine pump water? | {
"text": [
"Nile River"
],
"answer_start": [
277
]
} |
56cfe88d234ae51400d9c076 | Solar_energy | Shuman built the world’s first solar thermal power station in Maadi, Egypt, between 1912 and 1913. Shuman’s plant used parabolic troughs to power a 45–52 kilowatts (60–70 hp) engine that pumped more than 22,000 litres (4,800 imp gal; 5,800 US gal) of water per minute from the Nile River to adjacent cotton fields. Altho... | What slowed down the growth of solar energy? | {
"text": [
"the outbreak of World War I and the discovery of cheap oil"
],
"answer_start": [
324
]
} |
56cfe88d234ae51400d9c077 | Solar_energy | Shuman built the world’s first solar thermal power station in Maadi, Egypt, between 1912 and 1913. Shuman’s plant used parabolic troughs to power a 45–52 kilowatts (60–70 hp) engine that pumped more than 22,000 litres (4,800 imp gal; 5,800 US gal) of water per minute from the Nile River to adjacent cotton fields. Altho... | When was the interest in solar energy restored? | {
"text": [
"the 1970s"
],
"answer_start": [
494
]
} |
56ce5e92aab44d1400b88709 | Solar_energy | Solar hot water systems use sunlight to heat water. In low geographical latitudes (below 40 degrees) from 60 to 70% of the domestic hot water use with temperatures up to 60 °C can be provided by solar heating systems. The most common types of solar water heaters are evacuated tube collectors (44%) and glazed flat plate... | According to Shuman, up to what percentage of domestic hot water can be provided by solar heating systems? | {
"text": [
"70"
],
"answer_start": [
112
]
} |
56cfe96c234ae51400d9c091 | Solar_energy | Solar hot water systems use sunlight to heat water. In low geographical latitudes (below 40 degrees) from 60 to 70% of the domestic hot water use with temperatures up to 60 °C can be provided by solar heating systems. The most common types of solar water heaters are evacuated tube collectors (44%) and glazed flat plate... | What do Solar hot water systems use to heat water? | {
"text": [
"sunlight"
],
"answer_start": [
28
]
} |
56cfe96c234ae51400d9c092 | Solar_energy | Solar hot water systems use sunlight to heat water. In low geographical latitudes (below 40 degrees) from 60 to 70% of the domestic hot water use with temperatures up to 60 °C can be provided by solar heating systems. The most common types of solar water heaters are evacuated tube collectors (44%) and glazed flat plate... | How much hot water can be produced by solar heating systems in low geographical latitudes? | {
"text": [
"60 to 70% of the domestic hot water"
],
"answer_start": [
106
]
} |
56cfe96c234ae51400d9c093 | Solar_energy | Solar hot water systems use sunlight to heat water. In low geographical latitudes (below 40 degrees) from 60 to 70% of the domestic hot water use with temperatures up to 60 °C can be provided by solar heating systems. The most common types of solar water heaters are evacuated tube collectors (44%) and glazed flat plate... | What is a common type of solar water heater? | {
"text": [
"evacuated tube collectors"
],
"answer_start": [
267
]
} |
56cfe96c234ae51400d9c094 | Solar_energy | Solar hot water systems use sunlight to heat water. In low geographical latitudes (below 40 degrees) from 60 to 70% of the domestic hot water use with temperatures up to 60 °C can be provided by solar heating systems. The most common types of solar water heaters are evacuated tube collectors (44%) and glazed flat plate... | What type of solar water heater is used to heat pools? | {
"text": [
"unglazed plastic collectors"
],
"answer_start": [
381
]
} |
56ce5f4aaab44d1400b8870b | Solar_energy | As of 2007, the total installed capacity of solar hot water systems is approximately 154 thermal gigawatt (GWth). China is the world leader in their deployment with 70 GWth installed as of 2006 and a long-term goal of 210 GWth by 2020. Israel and Cyprus are the per capita leaders in the use of solar hot water systems w... | What was the total capacity of solar hot water systems in 2007 in gigawatts? | {
"text": [
"154"
],
"answer_start": [
85
]
} |
56ce5f4aaab44d1400b8870c | Solar_energy | As of 2007, the total installed capacity of solar hot water systems is approximately 154 thermal gigawatt (GWth). China is the world leader in their deployment with 70 GWth installed as of 2006 and a long-term goal of 210 GWth by 2020. Israel and Cyprus are the per capita leaders in the use of solar hot water systems w... | Over 90% of homes use solar hot water systems in which two countries? | {
"text": [
"Israel and Cyprus"
],
"answer_start": [
236
]
} |
56cfea9a234ae51400d9c0ab | Solar_energy | As of 2007, the total installed capacity of solar hot water systems is approximately 154 thermal gigawatt (GWth). China is the world leader in their deployment with 70 GWth installed as of 2006 and a long-term goal of 210 GWth by 2020. Israel and Cyprus are the per capita leaders in the use of solar hot water systems w... | What is the capacity of a solar hot water system? | {
"text": [
"approximately 154 thermal gigawatt"
],
"answer_start": [
71
]
} |
56cfea9a234ae51400d9c0ac | Solar_energy | As of 2007, the total installed capacity of solar hot water systems is approximately 154 thermal gigawatt (GWth). China is the world leader in their deployment with 70 GWth installed as of 2006 and a long-term goal of 210 GWth by 2020. Israel and Cyprus are the per capita leaders in the use of solar hot water systems w... | What country is the leader in the implementation of solar powered hot water systems? | {
"text": [
"China"
],
"answer_start": [
114
]
} |
56cfea9a234ae51400d9c0ad | Solar_energy | As of 2007, the total installed capacity of solar hot water systems is approximately 154 thermal gigawatt (GWth). China is the world leader in their deployment with 70 GWth installed as of 2006 and a long-term goal of 210 GWth by 2020. Israel and Cyprus are the per capita leaders in the use of solar hot water systems w... | What percentage of households use solar hot water systems in Israel and Cyprus? | {
"text": [
"over 90%"
],
"answer_start": [
324
]
} |
56cfea9a234ae51400d9c0ae | Solar_energy | As of 2007, the total installed capacity of solar hot water systems is approximately 154 thermal gigawatt (GWth). China is the world leader in their deployment with 70 GWth installed as of 2006 and a long-term goal of 210 GWth by 2020. Israel and Cyprus are the per capita leaders in the use of solar hot water systems w... | In what countries is the use to solar hot water used mainly for w=swimming pools? | {
"text": [
"United States, Canada and Australia"
],
"answer_start": [
361
]
} |
56ce5f72aab44d1400b8870f | Solar_energy | In the United States, heating, ventilation and air conditioning (HVAC) systems account for 30% (4.65 EJ/yr) of the energy used in commercial buildings and nearly 50% (10.1 EJ/yr) of the energy used in residential buildings. Solar heating, cooling and ventilation technologies can be used to offset a portion of this ener... | What percentage of energy in commercial buildings comes from HVAC systems? | {
"text": [
"50"
],
"answer_start": [
162
]
} |
56cfebbd234ae51400d9c0c7 | Solar_energy | In the United States, heating, ventilation and air conditioning (HVAC) systems account for 30% (4.65 EJ/yr) of the energy used in commercial buildings and nearly 50% (10.1 EJ/yr) of the energy used in residential buildings. Solar heating, cooling and ventilation technologies can be used to offset a portion of this ener... | How much energy does an HVAC system use in commercial locations? | {
"text": [
"30% (4.65 EJ/yr)"
],
"answer_start": [
91
]
} |
56cfebbd234ae51400d9c0c8 | Solar_energy | In the United States, heating, ventilation and air conditioning (HVAC) systems account for 30% (4.65 EJ/yr) of the energy used in commercial buildings and nearly 50% (10.1 EJ/yr) of the energy used in residential buildings. Solar heating, cooling and ventilation technologies can be used to offset a portion of this ener... | How much energy does an HVAC system use in residential locations? | {
"text": [
"50% (10.1 EJ/yr)"
],
"answer_start": [
162
]
} |
56cfebbd234ae51400d9c0c9 | Solar_energy | In the United States, heating, ventilation and air conditioning (HVAC) systems account for 30% (4.65 EJ/yr) of the energy used in commercial buildings and nearly 50% (10.1 EJ/yr) of the energy used in residential buildings. Solar heating, cooling and ventilation technologies can be used to offset a portion of this ener... | What can be used to balance out a portion of the energy used by HVAC systems? | {
"text": [
"Solar heating, cooling and ventilation technologies"
],
"answer_start": [
224
]
} |
56ce5ff2aab44d1400b88711 | Solar_energy | Thermal mass is any material that can be used to store heat—heat from the Sun in the case of solar energy. Common thermal mass materials include stone, cement and water. Historically they have been used in arid climates or warm temperate regions to keep buildings cool by absorbing solar energy during the day and radiat... | Materials that can be used to store heat are known as what kind of mass? | {
"text": [
"Thermal"
],
"answer_start": [
0
]
} |
56cfee97234ae51400d9c103 | Solar_energy | Thermal mass is any material that can be used to store heat—heat from the Sun in the case of solar energy. Common thermal mass materials include stone, cement and water. Historically they have been used in arid climates or warm temperate regions to keep buildings cool by absorbing solar energy during the day and radiat... | What is thermal mass? | {
"text": [
"any material that can be used to store heat"
],
"answer_start": [
16
]
} |
56cfee97234ae51400d9c104 | Solar_energy | Thermal mass is any material that can be used to store heat—heat from the Sun in the case of solar energy. Common thermal mass materials include stone, cement and water. Historically they have been used in arid climates or warm temperate regions to keep buildings cool by absorbing solar energy during the day and radiat... | What are typical thermal mass material? | {
"text": [
"stone, cement and water"
],
"answer_start": [
145
]
} |
56cfee97234ae51400d9c105 | Solar_energy | Thermal mass is any material that can be used to store heat—heat from the Sun in the case of solar energy. Common thermal mass materials include stone, cement and water. Historically they have been used in arid climates or warm temperate regions to keep buildings cool by absorbing solar energy during the day and radiat... | How is thermal mass used to keep buildings cool? | {
"text": [
"by absorbing solar energy during the day and radiating stored heat to the cooler atmosphere at night"
],
"answer_start": [
269
]
} |
56cfee97234ae51400d9c106 | Solar_energy | Thermal mass is any material that can be used to store heat—heat from the Sun in the case of solar energy. Common thermal mass materials include stone, cement and water. Historically they have been used in arid climates or warm temperate regions to keep buildings cool by absorbing solar energy during the day and radiat... | What is a something that determines the size of thermal mass? | {
"text": [
"climates"
],
"answer_start": [
211
]
} |
56cfee97234ae51400d9c107 | Solar_energy | Thermal mass is any material that can be used to store heat—heat from the Sun in the case of solar energy. Common thermal mass materials include stone, cement and water. Historically they have been used in arid climates or warm temperate regions to keep buildings cool by absorbing solar energy during the day and radiat... | What does thermal mass reduce the need for? | {
"text": [
"auxiliary heating and cooling equipment"
],
"answer_start": [
685
]
} |
56ce602faab44d1400b88713 | Solar_energy | A solar chimney (or thermal chimney, in this context) is a passive solar ventilation system composed of a vertical shaft connecting the interior and exterior of a building. As the chimney warms, the air inside is heated causing an updraft that pulls air through the building. Performance can be improved by using glazing... | What kind of system is a solar chimney? | {
"text": [
"passive solar ventilation"
],
"answer_start": [
59
]
} |
56cff05a234ae51400d9c11d | Solar_energy | A solar chimney (or thermal chimney, in this context) is a passive solar ventilation system composed of a vertical shaft connecting the interior and exterior of a building. As the chimney warms, the air inside is heated causing an updraft that pulls air through the building. Performance can be improved by using glazing... | What is a solar chimney? | {
"text": [
"a passive solar ventilation system"
],
"answer_start": [
57
]
} |
56cff05a234ae51400d9c11e | Solar_energy | A solar chimney (or thermal chimney, in this context) is a passive solar ventilation system composed of a vertical shaft connecting the interior and exterior of a building. As the chimney warms, the air inside is heated causing an updraft that pulls air through the building. Performance can be improved by using glazing... | What is a solar chimney made of? | {
"text": [
"a vertical shaft connecting the interior and exterior of a building"
],
"answer_start": [
104
]
} |
56cff05a234ae51400d9c11f | Solar_energy | A solar chimney (or thermal chimney, in this context) is a passive solar ventilation system composed of a vertical shaft connecting the interior and exterior of a building. As the chimney warms, the air inside is heated causing an updraft that pulls air through the building. Performance can be improved by using glazing... | How can the performance of a solar chimney be improved? | {
"text": [
"by using glazing and thermal mass materials in a way that mimics greenhouses"
],
"answer_start": [
304
]
} |
56ce60e4aab44d1400b88715 | Solar_energy | Deciduous trees and plants have been promoted as a means of controlling solar heating and cooling. When planted on the southern side of a building in the northern hemisphere or the northern side in the southern hemisphere, their leaves provide shade during the summer, while the bare limbs allow light to pass during the... | The placement of deciduous trees on the Equator facing side of a building can have a negative effect on solar availability in which season? | {
"text": [
"winter"
],
"answer_start": [
321
]
} |
56cff48f234ae51400d9c159 | Solar_energy | Deciduous trees and plants have been promoted as a means of controlling solar heating and cooling. When planted on the southern side of a building in the northern hemisphere or the northern side in the southern hemisphere, their leaves provide shade during the summer, while the bare limbs allow light to pass during the... | What is something that is used to control solar heating and cooling? | {
"text": [
"trees and plants"
],
"answer_start": [
10
]
} |
56cff48f234ae51400d9c15a | Solar_energy | Deciduous trees and plants have been promoted as a means of controlling solar heating and cooling. When planted on the southern side of a building in the northern hemisphere or the northern side in the southern hemisphere, their leaves provide shade during the summer, while the bare limbs allow light to pass during the... | How much solar radiation is blocked by leafless trees? | {
"text": [
"1/3 to 1/2"
],
"answer_start": [
362
]
} |
56cff48f234ae51400d9c15b | Solar_energy | Deciduous trees and plants have been promoted as a means of controlling solar heating and cooling. When planted on the southern side of a building in the northern hemisphere or the northern side in the southern hemisphere, their leaves provide shade during the summer, while the bare limbs allow light to pass during the... | Why should trees not be planted on the side of a building facing the equator? | {
"text": [
"they will interfere with winter solar availability"
],
"answer_start": [
637
]
} |
56cff48f234ae51400d9c15c | Solar_energy | Deciduous trees and plants have been promoted as a means of controlling solar heating and cooling. When planted on the southern side of a building in the northern hemisphere or the northern side in the southern hemisphere, their leaves provide shade during the summer, while the bare limbs allow light to pass during the... | What side of a building should trees be planted without greatly affecting solar gain in the winter? | {
"text": [
"east and west"
],
"answer_start": [
723
]
} |
56ce61a4aab44d1400b88718 | Solar_energy | Solar cookers use sunlight for cooking, drying and pasteurization. They can be grouped into three broad categories: box cookers, panel cookers and reflector cookers. The simplest solar cooker is the box cooker first built by Horace de Saussure in 1767. A basic box cooker consists of an insulated container with a transp... | Horace de Saussure built the first box cooker in what year? | {
"text": [
"1767"
],
"answer_start": [
247
]
} |
56ce61a4aab44d1400b88719 | Solar_energy | Solar cookers use sunlight for cooking, drying and pasteurization. They can be grouped into three broad categories: box cookers, panel cookers and reflector cookers. The simplest solar cooker is the box cooker first built by Horace de Saussure in 1767. A basic box cooker consists of an insulated container with a transp... | Reflector cookers can reach temperatures in Celsius of up to what? | {
"text": [
"315"
],
"answer_start": [
749
]
} |
56cff5ff234ae51400d9c175 | Solar_energy | Solar cookers use sunlight for cooking, drying and pasteurization. They can be grouped into three broad categories: box cookers, panel cookers and reflector cookers. The simplest solar cooker is the box cooker first built by Horace de Saussure in 1767. A basic box cooker consists of an insulated container with a transp... | What are solar cookers used for? | {
"text": [
"cooking, drying and pasteurization"
],
"answer_start": [
31
]
} |
56cff5ff234ae51400d9c176 | Solar_energy | Solar cookers use sunlight for cooking, drying and pasteurization. They can be grouped into three broad categories: box cookers, panel cookers and reflector cookers. The simplest solar cooker is the box cooker first built by Horace de Saussure in 1767. A basic box cooker consists of an insulated container with a transp... | What are the 3 main categories of solar cookers? | {
"text": [
"box cookers, panel cookers and reflector cookers"
],
"answer_start": [
116
]
} |
56cff5ff234ae51400d9c177 | Solar_energy | Solar cookers use sunlight for cooking, drying and pasteurization. They can be grouped into three broad categories: box cookers, panel cookers and reflector cookers. The simplest solar cooker is the box cooker first built by Horace de Saussure in 1767. A basic box cooker consists of an insulated container with a transp... | Who created the box cooker? | {
"text": [
"Horace de Saussure"
],
"answer_start": [
225
]
} |
56cff5ff234ae51400d9c178 | Solar_energy | Solar cookers use sunlight for cooking, drying and pasteurization. They can be grouped into three broad categories: box cookers, panel cookers and reflector cookers. The simplest solar cooker is the box cooker first built by Horace de Saussure in 1767. A basic box cooker consists of an insulated container with a transp... | What is the typical temperature range for a box cooker? | {
"text": [
"90–150 °C (194–302 °F)"
],
"answer_start": [
429
]
} |
56cff5ff234ae51400d9c179 | Solar_energy | Solar cookers use sunlight for cooking, drying and pasteurization. They can be grouped into three broad categories: box cookers, panel cookers and reflector cookers. The simplest solar cooker is the box cooker first built by Horace de Saussure in 1767. A basic box cooker consists of an insulated container with a transp... | What do reflector cookers require to function? | {
"text": [
"direct light"
],
"answer_start": [
787
]
} |
56ce6232aab44d1400b8871d | Solar_energy | Solar concentrating technologies such as parabolic dish, trough and Scheffler reflectors can provide process heat for commercial and industrial applications. The first commercial system was the Solar Total Energy Project (STEP) in Shenandoah, Georgia, USA where a field of 114 parabolic dishes provided 50% of the proces... | The Solar Total Energy Project had a field of how many parabolic dishes? | {
"text": [
"114"
],
"answer_start": [
273
]
} |
56ce6232aab44d1400b8871e | Solar_energy | Solar concentrating technologies such as parabolic dish, trough and Scheffler reflectors can provide process heat for commercial and industrial applications. The first commercial system was the Solar Total Energy Project (STEP) in Shenandoah, Georgia, USA where a field of 114 parabolic dishes provided 50% of the proces... | Are transpired collectors more or less cost-effective than glazed collection systems? | {
"text": [
"more"
],
"answer_start": [
1444
]
} |
56cff819234ae51400d9c1a9 | Solar_energy | Solar concentrating technologies such as parabolic dish, trough and Scheffler reflectors can provide process heat for commercial and industrial applications. The first commercial system was the Solar Total Energy Project (STEP) in Shenandoah, Georgia, USA where a field of 114 parabolic dishes provided 50% of the proces... | What are some examples of solar concentrating technologies? | {
"text": [
"parabolic dish, trough and Scheffler reflectors"
],
"answer_start": [
41
]
} |
56cff819234ae51400d9c1aa | Solar_energy | Solar concentrating technologies such as parabolic dish, trough and Scheffler reflectors can provide process heat for commercial and industrial applications. The first commercial system was the Solar Total Energy Project (STEP) in Shenandoah, Georgia, USA where a field of 114 parabolic dishes provided 50% of the proces... | What was the first commercial solar concentrating system? | {
"text": [
"Solar Total Energy Project (STEP) in Shenandoah, Georgia, USA"
],
"answer_start": [
194
]
} |
56cff819234ae51400d9c1ab | Solar_energy | Solar concentrating technologies such as parabolic dish, trough and Scheffler reflectors can provide process heat for commercial and industrial applications. The first commercial system was the Solar Total Energy Project (STEP) in Shenandoah, Georgia, USA where a field of 114 parabolic dishes provided 50% of the proces... | What is one of the oldest uses of solar energy? | {
"text": [
"use of evaporation ponds to obtain salt from sea water"
],
"answer_start": [
686
]
} |
56cff819234ae51400d9c1ac | Solar_energy | Solar concentrating technologies such as parabolic dish, trough and Scheffler reflectors can provide process heat for commercial and industrial applications. The first commercial system was the Solar Total Energy Project (STEP) in Shenandoah, Georgia, USA where a field of 114 parabolic dishes provided 50% of the proces... | What are some items used to dry clothes without the use of electricity? | {
"text": [
"Clothes lines, clotheshorses, and clothes racks"
],
"answer_start": [
913
]
} |
56cff819234ae51400d9c1ad | Solar_energy | Solar concentrating technologies such as parabolic dish, trough and Scheffler reflectors can provide process heat for commercial and industrial applications. The first commercial system was the Solar Total Energy Project (STEP) in Shenandoah, Georgia, USA where a field of 114 parabolic dishes provided 50% of the proces... | What are Unglazed transpired collectors? | {
"text": [
"perforated sun-facing walls used for preheating ventilation air"
],
"answer_start": [
1178
]
} |
56ce6382aab44d1400b88732 | Solar_energy | Solar distillation can be used to make saline or brackish water potable. The first recorded instance of this was by 16th-century Arab alchemists. A large-scale solar distillation project was first constructed in 1872 in the Chilean mining town of Las Salinas. The plant, which had solar collection area of 4,700 m2 (51,0... | In what year was a large scale solar distillation project constructed in Las Salinas? | {
"text": [
"1872"
],
"answer_start": [
212
]
} |
56d0007f234ae51400d9c243 | Solar_energy | Solar distillation can be used to make saline or brackish water potable. The first recorded instance of this was by 16th-century Arab alchemists. A large-scale solar distillation project was first constructed in 1872 in the Chilean mining town of Las Salinas. The plant, which had solar collection area of 4,700 m2 (51,0... | What is used to make saline or brackish water drinkable? | {
"text": [
"Solar distillation"
],
"answer_start": [
0
]
} |
56d0007f234ae51400d9c244 | Solar_energy | Solar distillation can be used to make saline or brackish water potable. The first recorded instance of this was by 16th-century Arab alchemists. A large-scale solar distillation project was first constructed in 1872 in the Chilean mining town of Las Salinas. The plant, which had solar collection area of 4,700 m2 (51,0... | By who was the first record of solar distillation done by? | {
"text": [
"16th-century Arab alchemists"
],
"answer_start": [
116
]
} |
56d0007f234ae51400d9c245 | Solar_energy | Solar distillation can be used to make saline or brackish water potable. The first recorded instance of this was by 16th-century Arab alchemists. A large-scale solar distillation project was first constructed in 1872 in the Chilean mining town of Las Salinas. The plant, which had solar collection area of 4,700 m2 (51,0... | When was the first large solar distillation plant created? | {
"text": [
"1872"
],
"answer_start": [
212
]
} |
56d0007f234ae51400d9c246 | Solar_energy | Solar distillation can be used to make saline or brackish water potable. The first recorded instance of this was by 16th-century Arab alchemists. A large-scale solar distillation project was first constructed in 1872 in the Chilean mining town of Las Salinas. The plant, which had solar collection area of 4,700 m2 (51,0... | How much water was produced by the plant? | {
"text": [
"22,700 L (5,000 imp gal; 6,000 US gal) per day"
],
"answer_start": [
351
]
} |
56d0007f234ae51400d9c247 | Solar_energy | Solar distillation can be used to make saline or brackish water potable. The first recorded instance of this was by 16th-century Arab alchemists. A large-scale solar distillation project was first constructed in 1872 in the Chilean mining town of Las Salinas. The plant, which had solar collection area of 4,700 m2 (51,0... | What is an example of a solar distillation design? | {
"text": [
"single-slope"
],
"answer_start": [
457
]
} |
56ce64a8aab44d1400b88745 | Solar_energy | Solar water disinfection (SODIS) involves exposing water-filled plastic polyethylene terephthalate (PET) bottles to sunlight for several hours. Exposure times vary depending on weather and climate from a minimum of six hours to two days during fully overcast conditions. It is recommended by the World Health Organizatio... | Solar water disinfection is recommended by which organization? | {
"text": [
"the World Health Organization"
],
"answer_start": [
292
]
} |
56d004ab234ae51400d9c25f | Solar_energy | Solar water disinfection (SODIS) involves exposing water-filled plastic polyethylene terephthalate (PET) bottles to sunlight for several hours. Exposure times vary depending on weather and climate from a minimum of six hours to two days during fully overcast conditions. It is recommended by the World Health Organizatio... | How long should the plastic bottles filled with water be exposed to sunlight during Solar water disinfection? | {
"text": [
"a minimum of six hours to two days during fully overcast conditions"
],
"answer_start": [
202
]
} |
56d004ab234ae51400d9c260 | Solar_energy | Solar water disinfection (SODIS) involves exposing water-filled plastic polyethylene terephthalate (PET) bottles to sunlight for several hours. Exposure times vary depending on weather and climate from a minimum of six hours to two days during fully overcast conditions. It is recommended by the World Health Organizatio... | What does the World Health Organization say about Solar water disinfection? | {
"text": [
"a viable method for household water treatment and safe storage"
],
"answer_start": [
325
]
} |
56d004ab234ae51400d9c261 | Solar_energy | Solar water disinfection (SODIS) involves exposing water-filled plastic polyethylene terephthalate (PET) bottles to sunlight for several hours. Exposure times vary depending on weather and climate from a minimum of six hours to two days during fully overcast conditions. It is recommended by the World Health Organizatio... | How many people use Solar water disinfection to disinfect their drinking water? | {
"text": [
"Over two million people in developing countries"
],
"answer_start": [
389
]
} |
56ce659aaab44d1400b88749 | Solar_energy | Solar energy may be used in a water stabilisation pond to treat waste water without chemicals or electricity. A further environmental advantage is that algae grow in such ponds and consume carbon dioxide in photosynthesis, although algae may produce toxic chemicals that make the water unusable. | What is a possible negative effect of algae in water stabilization ponds? | {
"text": [
"toxic chemicals"
],
"answer_start": [
250
]
} |
56d0051e234ae51400d9c26f | Solar_energy | Solar energy may be used in a water stabilisation pond to treat waste water without chemicals or electricity. A further environmental advantage is that algae grow in such ponds and consume carbon dioxide in photosynthesis, although algae may produce toxic chemicals that make the water unusable. | For what reason would solar energy be used in a water stabilisation pond? | {
"text": [
"to treat waste water without chemicals or electricity"
],
"answer_start": [
55
]
} |
56d0051e234ae51400d9c270 | Solar_energy | Solar energy may be used in a water stabilisation pond to treat waste water without chemicals or electricity. A further environmental advantage is that algae grow in such ponds and consume carbon dioxide in photosynthesis, although algae may produce toxic chemicals that make the water unusable. | What is a reason why the water from a water stabilisation pond may be unusable? | {
"text": [
"algae may produce toxic chemicals"
],
"answer_start": [
232
]
} |
56ce6629aab44d1400b8874d | Solar_energy | Solar power is anticipated to become the world's largest source of electricity by 2050, with solar photovoltaics and concentrated solar power contributing 16 and 11 percent to the global overall consumption, respectively. | By what year is solar power expected to become the world's greatest source of electricity? | {
"text": [
"2050"
],
"answer_start": [
82
]
} |
56d00697234ae51400d9c297 | Solar_energy | Solar power is anticipated to become the world's largest source of electricity by 2050, with solar photovoltaics and concentrated solar power contributing 16 and 11 percent to the global overall consumption, respectively. | When is solar power is foreseen to become the largest source of electricity? | {
"text": [
"2050"
],
"answer_start": [
82
]
} |
56ce666caab44d1400b88755 | Solar_energy | Commercial CSP plants were first developed in the 1980s. Since 1985 the eventually 354 MW SEGS CSP installation, in the Mojave Desert of California, is the largest solar power plant in the world. Other large CSP plants include the 150 MW Solnova Solar Power Station and the 100 MW Andasol solar power station, both in Sp... | The largest solar power plant in the world is located in what desert? | {
"text": [
"the Mojave Desert"
],
"answer_start": [
116
]
} |
56ce666caab44d1400b88756 | Solar_energy | Commercial CSP plants were first developed in the 1980s. Since 1985 the eventually 354 MW SEGS CSP installation, in the Mojave Desert of California, is the largest solar power plant in the world. Other large CSP plants include the 150 MW Solnova Solar Power Station and the 100 MW Andasol solar power station, both in Sp... | Less than 1% of the world's total grid electricity was generated by solar energy in what year? | {
"text": [
"2013"
],
"answer_start": [
686
]
} |
56d074ff234ae51400d9c2ee | Solar_energy | Commercial CSP plants were first developed in the 1980s. Since 1985 the eventually 354 MW SEGS CSP installation, in the Mojave Desert of California, is the largest solar power plant in the world. Other large CSP plants include the 150 MW Solnova Solar Power Station and the 100 MW Andasol solar power station, both in Sp... | What is the largest solar power plant in the world? | {
"text": [
"354 MW SEGS CSP"
],
"answer_start": [
83
]
} |
56d074ff234ae51400d9c2ef | Solar_energy | Commercial CSP plants were first developed in the 1980s. Since 1985 the eventually 354 MW SEGS CSP installation, in the Mojave Desert of California, is the largest solar power plant in the world. Other large CSP plants include the 150 MW Solnova Solar Power Station and the 100 MW Andasol solar power station, both in Sp... | Where is the largest solar power plant in the world located? | {
"text": [
"Mojave Desert of California"
],
"answer_start": [
120
]
} |
56d074ff234ae51400d9c2f0 | Solar_energy | Commercial CSP plants were first developed in the 1980s. Since 1985 the eventually 354 MW SEGS CSP installation, in the Mojave Desert of California, is the largest solar power plant in the world. Other large CSP plants include the 150 MW Solnova Solar Power Station and the 100 MW Andasol solar power station, both in Sp... | What are the largest photovoltaic solar power plants? | {
"text": [
"The 250 MW Agua Caliente Solar Project, in the United States, and the 221 MW Charanka Solar Park in India"
],
"answer_start": [
325
]
} |
56ce66aeaab44d1400b88759 | Solar_energy | In the last two decades, photovoltaics (PV), also known as solar PV, has evolved from a pure niche market of small scale applications towards becoming a mainstream electricity source. A solar cell is a device that converts light directly into electricity using the photoelectric effect. The first solar cell was construc... | In the 1880s, who constructed the first solar cell? | {
"text": [
"Charles Fritts"
],
"answer_start": [
327
]
} |
56ce66aeaab44d1400b8875a | Solar_energy | In the last two decades, photovoltaics (PV), also known as solar PV, has evolved from a pure niche market of small scale applications towards becoming a mainstream electricity source. A solar cell is a device that converts light directly into electricity using the photoelectric effect. The first solar cell was construc... | In what year was the crystalline silicon solar cell constructed? | {
"text": [
"1954"
],
"answer_start": [
819
]
} |
56d07aa6234ae51400d9c314 | Solar_energy | In the last two decades, photovoltaics (PV), also known as solar PV, has evolved from a pure niche market of small scale applications towards becoming a mainstream electricity source. A solar cell is a device that converts light directly into electricity using the photoelectric effect. The first solar cell was construc... | What has happened to photovoltaic in the past 20 years? | {
"text": [
"evolved from a pure niche market of small scale applications towards becoming a mainstream electricity source"
],
"answer_start": [
73
]
} |
56d07aa6234ae51400d9c315 | Solar_energy | In the last two decades, photovoltaics (PV), also known as solar PV, has evolved from a pure niche market of small scale applications towards becoming a mainstream electricity source. A solar cell is a device that converts light directly into electricity using the photoelectric effect. The first solar cell was construc... | What is a solar cell? | {
"text": [
"a device that converts light directly into electricity"
],
"answer_start": [
200
]
} |
56d07aa6234ae51400d9c316 | Solar_energy | In the last two decades, photovoltaics (PV), also known as solar PV, has evolved from a pure niche market of small scale applications towards becoming a mainstream electricity source. A solar cell is a device that converts light directly into electricity using the photoelectric effect. The first solar cell was construc... | Who created the first solar cell? | {
"text": [
"Charles Fritts"
],
"answer_start": [
327
]
} |
56d07aa6234ae51400d9c317 | Solar_energy | In the last two decades, photovoltaics (PV), also known as solar PV, has evolved from a pure niche market of small scale applications towards becoming a mainstream electricity source. A solar cell is a device that converts light directly into electricity using the photoelectric effect. The first solar cell was construc... | Who created the first solar cell using silver selenide in place of copper oxide? | {
"text": [
"Dr Bruno Lange"
],
"answer_start": [
383
]
} |
56d07aa6234ae51400d9c318 | Solar_energy | In the last two decades, photovoltaics (PV), also known as solar PV, has evolved from a pure niche market of small scale applications towards becoming a mainstream electricity source. A solar cell is a device that converts light directly into electricity using the photoelectric effect. The first solar cell was construc... | Who created the crystalline silicon solar cell? | {
"text": [
"Gerald Pearson, Calvin Fuller and Daryl Chapin"
],
"answer_start": [
726
]
} |
56ce66e4aab44d1400b8875d | Solar_energy | Concentrating Solar Power (CSP) systems use lenses or mirrors and tracking systems to focus a large area of sunlight into a small beam. The concentrated heat is then used as a heat source for a conventional power plant. A wide range of concentrating technologies exists; the most developed are the parabolic trough, the ... | In all the different CSP systems, concentrated sunlight is used to heat what? | {
"text": [
"a working fluid"
],
"answer_start": [
491
]
} |
56d07c41234ae51400d9c31e | Solar_energy | Concentrating Solar Power (CSP) systems use lenses or mirrors and tracking systems to focus a large area of sunlight into a small beam. The concentrated heat is then used as a heat source for a conventional power plant. A wide range of concentrating technologies exists; the most developed are the parabolic trough, the ... | What do Concentrating Solar Power systems use? | {
"text": [
"lenses or mirrors and tracking systems"
],
"answer_start": [
44
]
} |
56d07c41234ae51400d9c31f | Solar_energy | Concentrating Solar Power (CSP) systems use lenses or mirrors and tracking systems to focus a large area of sunlight into a small beam. The concentrated heat is then used as a heat source for a conventional power plant. A wide range of concentrating technologies exists; the most developed are the parabolic trough, the ... | What is the heat generated from a Concentrating Solar Power system used for? | {
"text": [
"a heat source for a conventional power plant"
],
"answer_start": [
174
]
} |
56d07c41234ae51400d9c320 | Solar_energy | Concentrating Solar Power (CSP) systems use lenses or mirrors and tracking systems to focus a large area of sunlight into a small beam. The concentrated heat is then used as a heat source for a conventional power plant. A wide range of concentrating technologies exists; the most developed are the parabolic trough, the ... | What is one of the most developed Concentrating Solar Power technologies? | {
"text": [
"the Stirling dish"
],
"answer_start": [
360
]
} |
56d07c41234ae51400d9c321 | Solar_energy | Concentrating Solar Power (CSP) systems use lenses or mirrors and tracking systems to focus a large area of sunlight into a small beam. The concentrated heat is then used as a heat source for a conventional power plant. A wide range of concentrating technologies exists; the most developed are the parabolic trough, the ... | What do Concentrating Solar Power technologies have in common? | {
"text": [
"a working fluid is heated by the concentrated sunlight"
],
"answer_start": [
491
]
} |
56ce6ea0aab44d1400b88785 | Solar_energy | The common features of passive solar architecture are orientation relative to the Sun, compact proportion (a low surface area to volume ratio), selective shading (overhangs) and thermal mass. When these features are tailored to the local climate and environment they can produce well-lit spaces that stay in a comfortabl... | Socrate's what is a classic example of passive solar design? | {
"text": [
"Megaron House"
],
"answer_start": [
351
]
} |
56d08052234ae51400d9c32c | Solar_energy | The common features of passive solar architecture are orientation relative to the Sun, compact proportion (a low surface area to volume ratio), selective shading (overhangs) and thermal mass. When these features are tailored to the local climate and environment they can produce well-lit spaces that stay in a comfortabl... | What is a common feature of passive solar architecture? | {
"text": [
"orientation relative to the Sun"
],
"answer_start": [
54
]
} |
56d08052234ae51400d9c32d | Solar_energy | The common features of passive solar architecture are orientation relative to the Sun, compact proportion (a low surface area to volume ratio), selective shading (overhangs) and thermal mass. When these features are tailored to the local climate and environment they can produce well-lit spaces that stay in a comfortabl... | What is produced when the features of passive solar architecture are customized to the environment? | {
"text": [
"well-lit spaces that stay in a comfortable temperature range"
],
"answer_start": [
279
]
} |
56d08052234ae51400d9c32e | Solar_energy | The common features of passive solar architecture are orientation relative to the Sun, compact proportion (a low surface area to volume ratio), selective shading (overhangs) and thermal mass. When these features are tailored to the local climate and environment they can produce well-lit spaces that stay in a comfortabl... | What is an example of passive solar design? | {
"text": [
"Socrates' Megaron House"
],
"answer_start": [
341
]
} |
56d08052234ae51400d9c32f | Solar_energy | The common features of passive solar architecture are orientation relative to the Sun, compact proportion (a low surface area to volume ratio), selective shading (overhangs) and thermal mass. When these features are tailored to the local climate and environment they can produce well-lit spaces that stay in a comfortabl... | What kind of equipment can improve system performance? | {
"text": [
"pumps, fans and switchable windows"
],
"answer_start": [
609
]
} |
56ce6efbaab44d1400b88787 | Solar_energy | Urban heat islands (UHI) are metropolitan areas with higher temperatures than that of the surrounding environment. The higher temperatures are a result of increased absorption of the Solar light by urban materials such as asphalt and concrete, which have lower albedos and higher heat capacities than those in the natura... | UHI is an abbreviation of what? | {
"text": [
"Urban heat islands"
],
"answer_start": [
0
]
} |
56ce6efbaab44d1400b88788 | Solar_energy | Urban heat islands (UHI) are metropolitan areas with higher temperatures than that of the surrounding environment. The higher temperatures are a result of increased absorption of the Solar light by urban materials such as asphalt and concrete, which have lower albedos and higher heat capacities than those in the natura... | A program in Los Angeles believes that with $1 billion, city temperatures could be reduced by approximately how many degrees in Celsius? | {
"text": [
"3"
],
"answer_start": [
597
]
} |
56d0817d234ae51400d9c334 | Solar_energy | Urban heat islands (UHI) are metropolitan areas with higher temperatures than that of the surrounding environment. The higher temperatures are a result of increased absorption of the Solar light by urban materials such as asphalt and concrete, which have lower albedos and higher heat capacities than those in the natura... | What are the metropolitan areas with higher temperatures than the surrounding areas called? | {
"text": [
"Urban heat islands"
],
"answer_start": [
0
]
} |
56d0817d234ae51400d9c335 | Solar_energy | Urban heat islands (UHI) are metropolitan areas with higher temperatures than that of the surrounding environment. The higher temperatures are a result of increased absorption of the Solar light by urban materials such as asphalt and concrete, which have lower albedos and higher heat capacities than those in the natura... | What materials absorb sunlight and create higher temperatures than natural materials? | {
"text": [
"asphalt and concrete"
],
"answer_start": [
222
]
} |
56d0817d234ae51400d9c336 | Solar_energy | Urban heat islands (UHI) are metropolitan areas with higher temperatures than that of the surrounding environment. The higher temperatures are a result of increased absorption of the Solar light by urban materials such as asphalt and concrete, which have lower albedos and higher heat capacities than those in the natura... | What is a way to reduce the high temperatures created in urban heat islands? | {
"text": [
"paint buildings and roads white and plant trees"
],
"answer_start": [
398
]
} |
56ce7352aab44d1400b887a3 | Solar_energy | Agriculture and horticulture seek to optimize the capture of solar energy in order to optimize the productivity of plants. Techniques such as timed planting cycles, tailored row orientation, staggered heights between rows and the mixing of plant varieties can improve crop yields. While sunlight is generally considered ... | During the Little Ice Age, what did English and French farmers use to increase collection of solar energy? | {
"text": [
"fruit walls"
],
"answer_start": [
506
]
} |
56ce7352aab44d1400b887a4 | Solar_energy | Agriculture and horticulture seek to optimize the capture of solar energy in order to optimize the productivity of plants. Techniques such as timed planting cycles, tailored row orientation, staggered heights between rows and the mixing of plant varieties can improve crop yields. While sunlight is generally considered ... | Vinters have adopted solar technology to do what? | {
"text": [
"power grape presses"
],
"answer_start": [
1168
]
} |
56d086c9234ae51400d9c340 | Solar_energy | Agriculture and horticulture seek to optimize the capture of solar energy in order to optimize the productivity of plants. Techniques such as timed planting cycles, tailored row orientation, staggered heights between rows and the mixing of plant varieties can improve crop yields. While sunlight is generally considered ... | Why do agriculture and horticulture seek to make the most use of the solar energy captured? | {
"text": [
"to optimize the productivity of plants"
],
"answer_start": [
83
]
} |
56d086c9234ae51400d9c341 | Solar_energy | Agriculture and horticulture seek to optimize the capture of solar energy in order to optimize the productivity of plants. Techniques such as timed planting cycles, tailored row orientation, staggered heights between rows and the mixing of plant varieties can improve crop yields. While sunlight is generally considered ... | What are some techniques used to improve crop production? | {
"text": [
"timed planting cycles, tailored row orientation, staggered heights between rows and the mixing of plant varieties"
],
"answer_start": [
142
]
} |
56d086c9234ae51400d9c342 | Solar_energy | Agriculture and horticulture seek to optimize the capture of solar energy in order to optimize the productivity of plants. Techniques such as timed planting cycles, tailored row orientation, staggered heights between rows and the mixing of plant varieties can improve crop yields. While sunlight is generally considered ... | What did French and English farmers do during the Little Ice Age to gain more solar energy? | {
"text": [
"employed fruit walls"
],
"answer_start": [
497
]
} |
56d086c9234ae51400d9c343 | Solar_energy | Agriculture and horticulture seek to optimize the capture of solar energy in order to optimize the productivity of plants. Techniques such as timed planting cycles, tailored row orientation, staggered heights between rows and the mixing of plant varieties can improve crop yields. While sunlight is generally considered ... | What was the purpose of the fruit walls built by French and English farmers? | {
"text": [
"acted as thermal masses and accelerated ripening by keeping plants warm"
],
"answer_start": [
574
]
} |
56ce7376aab44d1400b887a7 | Solar_energy | Greenhouses convert solar light to heat, enabling year-round production and the growth (in enclosed environments) of specialty crops and other plants not naturally suited to the local climate. Primitive greenhouses were first used during Roman times to produce cucumbers year-round for the Roman emperor Tiberius. The fi... | When were the first greenhouses used? | {
"text": [
"Roman times"
],
"answer_start": [
238
]
} |
56ce7376aab44d1400b887a8 | Solar_energy | Greenhouses convert solar light to heat, enabling year-round production and the growth (in enclosed environments) of specialty crops and other plants not naturally suited to the local climate. Primitive greenhouses were first used during Roman times to produce cucumbers year-round for the Roman emperor Tiberius. The fi... | In what century were the first modern greenhouses constructed? | {
"text": [
"the 16th"
],
"answer_start": [
367
]
} |
56d0875b234ae51400d9c348 | Solar_energy | Greenhouses convert solar light to heat, enabling year-round production and the growth (in enclosed environments) of specialty crops and other plants not naturally suited to the local climate. Primitive greenhouses were first used during Roman times to produce cucumbers year-round for the Roman emperor Tiberius. The fi... | What do greenhouses do with solar energy? | {
"text": [
"convert solar light to heat"
],
"answer_start": [
12
]
} |
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