Acid rain is a term that refers to not just rain but also other forms of precipitation such as snow, hail, sleet, and fog that has a higher acidity than normal. Acid rain is caused by the burning of ...
Acid rain has been greatly reduced but tons of toxis still drift down each year. MARCH 4, 2013— -- Acid rain commanded as much attention in the 1990s as global warming or the hole in the ozone ...
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