Question

The atmospheric pollution is generally studied as:
A. Tropospheric pollution
B. Stratospheric pollution
C. Mesospheric pollution
D. None of above

Answer 1

Hint: Troposphere is the most important region of atmosphere and presence of unwanted substances in this layer results in tropospheric pollution.

Complete step by step answer: Since, the troposphere is the lowest layer of the atmosphere and all living organisms live under it, it is considered as the most important region of the atmosphere. The pollution in this layer is generally termed as atmospheric pollution. The major gaseous pollutants present in the troposphere are oxide of sulphur, nitrogen, carbon and hydrocarbon etc.
Whereas stratospheric pollution deals with ozone layer depletion mainly due chlorofluorocarbons (CFCs). Mesosphere being the layer above both the troposphere and stratosphere, gets some pollution from high-flying aircraft and rocket engines, which flew into that range of the atmosphere.
Hence the correct answer is option(A), tropospheric pollution

Additional Information: Troposphere is the region which contains water vapour. The temperature of this region decreases with altitude. Almost all weather conditions occur in the troposphere only. Ozone layer that is responsible for protecting the earth from harmful radiations from sun, is available in the lower part of the stratosphere.
The Mesosphere is the coldest layer of the Earth’s atmosphere.

Note: In the troposphere the burning of fossil fuel like coal, automobile fuel produce oxides of sulphur and nitrogen. These oxides react with moisture and air and form acids like sulphuric acid and nitric acid. These acids come with rain on the surface of earth in the form of acid rain and cause harmful effects on plants, buildings etc.