Acid rain-saurer regen

Acid rain     1. History of acid rain   In the end of the seventies the problem with acid rain was discovered. There were a lot of extensive forest diebacks and lakes became acid. First observations were made in Sweden where you could see absolute clean lakes. It turned out that these lakes were so clean because there was no life any more. In some lakes the ph-value was already three.

This is a normal ph-value of acetic acid. In the following a big hype was produced and the perception of acid or toxic rain was formed. The cause of the acid rain people supposed was the greenhouse effect. But now of course it is detected that acid rain is for example produced by exhaust gases also by air pollution or thunderstorms which will be more explained in the following part.   The effects of acid rain        

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