Obviously, it is not manmade chemical solution....
- When chemicals from automobiles and factories mix with the water, they form acids. Most of those chemicals come from burning coal, oil, and fuel. Acid rain has caused damage in parts of North America, Europe, and Asia. Since the 1950's, the damage is worse. Now it harms areas far away from cities.
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*"Acid rain." World Book Discover. World Book, 2012. Web. 18 Nov. 2012
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