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This is a free sample preview of the essay
Air Pollution
Beginning of essay
Biology 2B
The Problem
Contamination of the atmosphere by gaseous, liquid, or solid wastes or
by-products that can endanger human health and the health and welfare of plants
and animals, or can attack materials, reduce visibility, or produce undesirable
odors. Among air pollutants emitted by nat ....
Middle of essay
....tants but simply boost them higher into the atmosphere, thereby reducing
their concentration at the site. These pollutants may then be transported over
large distances and produce adverse effects in areas far from the site of the
original emission. Sulfur dioxide and nitrogen oxide emissions from the central
and eastern U.S. are causing acid rain in New York State, New England, and
eastern Canada. The pH level, or relative acidity, of many freshwater lakes in
that region has been altered so d.... |
| Number of words: 726 |
Approximate pages: 3 |
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