Question

In cities like Bombay and Calcutta the major air pollutants are

• A. Ozone
• B. Carbon monoxide and oxides of sulphur
• C. Hydrocarbons and not air
• D. Algal spores and marsh gas

Answer 1

The correct option is B Carbon monoxide and oxides of sulphur

Sulfur dioxide ($S{O}_2$) is one of a group of highly reactive gasses known as oxides of sulfur. The largest sources of $S{O}_2$ emissions are from fossil fuel combustion at power plants (73%) and other industrial facilities (20%). The largest human source of carbon dioxide emissions is from the combustion of fossil fuels. This produces 87% of human carbon dioxide emissions. $C{O}_2$ is the largest single source of global greenhouse gas emission.