Question

how are acid rains and smog caused? give detailed answer

Answer 1

When oxides of nitrogen and sulphur are released into the atmosphere they reach very high and react with water to form acidic compounds which fall as rain. This rain is called as acid rain.

When pollutants from the automobiles, factories etc are released into the atmosphere, under certain conditions of the atmosphere these particles remain suspended in the air. This suspended layer of pollutants forms smog.