Where does acid rain occur?

There is a small quantity of acid in rain water. But in European industrial areas or in North America, some rains have a higher acidity than elsewhere because in these areas the atmosphere is polluted by fumes and smoke from factories.

Rainwater combined with carbon dioxide in the air forms carbonic acid with very small concentrations. This weak acid can break down limestone.

Rainwater is also associated with the emissions of factories. This emissions can be carried away by the wind. Absorbed by moisture in the air, the gas turns into sulfuric acid and nitric acid. Rain again brings these acids to areas far away from the contaminated area.

Acid rain accelerates the corrosion process, meaning that the stone is worn. It also gradually pollutes many lakes and water streams, which are very dangerous for animals to live there.

HT