Acid Rain


forms when sulfur and nitrogen dioxides combine with moisture
in the atmosphere to produce rain, snow, or another kind of precipitation. This
kind of pollution may also be suspended in fog or deposited in a dry form. Acid
rain is most common in North America and Europe. has also been
detected in other areas of the world such as tropical rain forests of Africa.
Canada has placed limitations on the sulfur emissions. The United States has
not, so the emissions may still drift into Canada.
The acid rain cycle begins with hundreds of power plants burning
millions of tons of coal. Burning coal produces electricity for us. Coal is
made of carbon, but the coal that we mine is not pure ...

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sulfur dioxide combines with water, the result is sulfuric acid.
When nitrogen oxide gas combines with water, the result is also another acid.
When the clouds releases rain or other precipitation, the acid goes with it.
This is called acid rain.
The level of acid is measured in pH levels. The pH scale begins at 0
and ends with 14. A reading lower than 7 is called acidic, and a reading higher
than 7 is called basic. Seven is neutral. Normal rain is slightly acidic with a
pH level of about 6.5. Rain with a pH of 5.5 is then times more acidic than
normal rain and rain with pH of 4.5 is a hundred times more acidic than normal
rain. In parts of the country, rain with pH levels of 4.5 to 5.0 is common.
An English scientist named Robert Angus Smith discovered acid rain in
1872, but no other scientist continued this study. Then in 1961 the Sweden
wanted to know why the fish in their lakes were dying. Svante Odén discovered
that the reason was acid rain. After Odén's discovery, other ...

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PAPER DETAILS
Added: 11/22/2006 12:39:53 PM
Category: Science & Nature
Type: Premium Paper
Words: 505
Pages: 2

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