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ACID RAIN
Beginning of essay
When fossil fuels such as coal, gasoline, and fuel oils are burned, they emit
oxides of sulfur, carbon, and nitrogen into the air. These oxides combine with
moisture in the air to form sulfuric acid, carbonic acid, and nitric acid. When
it rains or snows, these acids are brought to Earth in what is ....
Middle of essay
....e, have shown signs of deterioration caused by acid rain.
Scientists use what is called the pH factor to measure the acidity or
alkalinity of liquid solutions. On a scale from 0 to 14, the number 0 represents
the highest level of acid and 14 the most basic or alkaline. A solution of
distilled water containing neither acids nor alkalies, or bases, is designated 7,
or neutral. If the pH level of rain falls below 5.5, the rain is considered
acidic. Rainfalls in the eastern United States and in W.... |
| Number of words: 449 |
Approximate pages: 2 |
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