A momemnt before the rain. 1 billion dollars every year is the annual sum estimated by the Canadian government for damage caused by acid rain. The strong winds which blow across Canada bring which them acid rain. Every year damage is caused to thousands of rivers and lakes and, and a large number of breeding grounds for various species of fish have disappeared as a result of this. In the plant world, the damage shows up in leaves and fruit.
Damages also show up in land animals, affecting their behavior and feeding patterns.
If this were not enough, acid rain also has a bad effect on people's health. A link has been found between acid rain and respiratory problems especially in children and people who suffer from asthma. Acid rain can raise the level of heavy metals, some of which are poisonous, in drinking water supplies. Finally, acid rain damages buildings, sculptures and monuments. One hypothesis claims that natural phenomena such as erupting volcanoes, forest fires, and the beak - down of organic matter by bacteria can cause production of acid compounds of sulfur and nitrogen, which produce the acidity in rain.