Question

Atmosphere of big/metropolitan cities is polluted most by --
A. Automobile exhausts
B. Pesticide residue
C. Household waste
D. Radio-active fall-out

Answer 1

Pollution is the introduction of harmful chemicals into the environment and those chemicals are called pollutants, and this pollution can occur naturally like any volcano ash and it may be man-made.

Complete step by step answer:
Air pollution can cause serious health issues and this air pollution occurs by the release of gases such as carbon monoxide and carbon dioxide and sulfur oxides, etc. Which are from various sources such as industrial wastes, and gases that are emitting from the vehicles and other household things.
When coming to metropolitan cities, there are large use of vehicles such as cars, motorcycles, and all compared to the towns and villages and at the same time there are fewer plants in the cities than villages, so there is more release of greenhouse gases to the environment.
This may affect various aspects such as breathing of pollutants to some extent causing damage to lungs and there are chances of accumulation of toxins in the tissues of the person.
Whereas in our country, most of the pollution is seen in metropolitan cities and most of the pollution that is 50% of pollution is by industrial wastes and gases that are releasing and 21% of the pollution is due to release of gases from vehicles such as automobile exhaust, and remaining pollution is by household products.
So from the above-given option, the correct option is A.

Note: The release of harmful chemical substances to the air is called pollution and it damages the environment and also the health of humans, in the cities, there is more use of vehicles where they release a lot of harmful gases to the environment.