ECOLOGY
HUMANS AND THE BIOSPHERE
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Fog
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Smog
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Acid Rain
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DDT
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Detailed explanation-1: -Smog = a mixture of chemicals that occurs as a gray-brown haze in the atmosphere.
Detailed explanation-2: -Photochemical smog is a type of smog produced when ultraviolet light from the sun reacts with nitrogen oxides in the atmosphere. It is visible as a brown haze, and is most prominent during the morning and afternoon, especially in densely populated, warm cities.
Detailed explanation-3: -Photochemical smog is a brownish-gray haze caused by the action of solar ultraviolet radiation on atmosphere polluted with hydrocarbons and oxides of nitrogen. It contains anthropogenic air pollutants, mainly ozone, nitric acid, and organic compounds, which are trapped near the ground by temperature inversion.
Detailed explanation-4: -Photochemical smog is formed when the pollutants in air react with the sunlight. The sunlight converts the pollutants into chemicals. So when sunlight reacts with nitrogen oxide in atmosphere, the smog is produced which is visible as a brown haze specially during morning and afternoon.
Detailed explanation-5: -The brown colour of the clouds results from the absorption and scattering of solar radiation by black carbon, fly ash, soil dust particles, and nitrogen dioxide. Such sources of air pollution have increased in the past several decades because of rapid economic development.