Factories and transportation (like cars or planes) depend on huge amounts of fuel every year. When these fuels burn they introduce smoke and other, less visible, by-products into the atmosphere.

Although wind and rain occasionally wash away the smoke given off by power plants and cars, the cumulative effect of air pollution poses a grave threat to humans and the environment.

Since the beginning of civilization, water has been used to carry away waste. Rivers, streams, canals, lakes, and oceans are currently used as wastebaskets for every kind of pollution man could create. Water has the capacity to break down or dissolve many materials, but not all materials. Waste materials that can eventually decompose in this way are called biodegradable. They are less of a long-term threat to the environment than are more persistent pollutants such as metals, and plastics. These substances remain in the water and can make it poisonous for many forms of life, like fish and other creatures. Even biodegradable pollutants can damage a water supply for long periods of time. As any form of contamination accumulates, life within the water starts to suffer. Lakes are especially vulnerable to pollution because they cannot cleanse themselves as rapidly as rivers or oceans.

In additio

Some common words found in the essay are:
Water Pollution, Noise Pollution, , Pollution Factories, noise pollution, air pollution, water pollution, cars trucks, air water,
Approximate Word count = 729
Approximate Pages = 3 (250 words per page double spaced)