Acid rains create complex problems and their impacts are far reaching. They increase soil acidity, this affecting land flora and fauna, cause acidification of lakes and streams thus affecting aquatic life, affects crop productivity and human health. Besides these they also corrodes buildings, monuments, statues, bridges, fences, railings etc.
Acid rains are carried away by prevailing winds to elsewhere where precipitation takes place.The acid rain is fast spreading to developing world where tropical soils are even more vulnerable than those of Europe. Sulphuric acids and nitric acid are the two main acids which cause acid rain.