Air Pollution
Beginning of paper
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 paper
.... identifiable
sources; sulfur dioxide, for example, comes from electric power plants burning
coal or oil. Others are formed through the action of sunlight on previously
emitted reactive materials. For example, ozone, a dangerous pollutant in smog,
is produced by the interaction of hydrocarbons and nitrogen oxides under the
influence of sunlight. Ozone has also caused serious crop damage. On the other
hand, the discovery in the 1980s that air pollutants such as fluorocarbons are
causing a ....
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Word count: 726
Page count: 3 (approximately 250 words per page)
