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Pollution
Rain and Flooding
Air Pollution

Why is normal rain not regarded as a form of acid rain?

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May 13, 2012 1:29AM

It depends on the amount of pollutants in the atmosphere. There is always an amount of Carbon Dioxide (CO2) in the atmosphere, and this causes a mild form of acid rain everywhere, so all rain is somewhat acidic.

More extreme acid rain occurs from unregulated emissions from factories and power plants.