Question

In big cities, air pollution is mostly due to

• A. Burning of fossil fuels
• B. Thermal power plant
• C. Sewage
• D. $H_{2}S$

Answer 1

The correct option is A Burning of fossil fuels

Major sources of atmospheric pollution are combustion of fossil fuels, mining and processing, chemical and cosmetic industries, welding, stone crushing, construction activity, textile industry etc. Most polluting gases are carbon monoxide, sulphur dioxides, unburnt hydrocarbons, nitrogen oxides and particulates. In big cities, the most important source of these pollutants is the combustion of fossil fuels in vehicles.