Part 1 of Essay
occurs when wastes dirty the make the air dirty. People produce most of the waste that cause . Such waste can be in the form of gases or be particulates (particles of solid or liquid manner). These substance result chiefly from burning fuel to power motor vehicles and to heat buildings. industrial processes and the ....

Part 2 of Essay
.... for heating and cooling homes,offices,buildings, and factories contribute significantly to . Electric power plants that burn coal or oil in also releases pollutants into the atmosphere. The major pollutants from these source are nitrogen- oxides, sulfur-oxides, and carbon dioxide. The rapid growth of population and industry, and the increased use of automobiles and airplanes has made a very serious and complicated problem. The air we know today and breathe has become so filled with pollutants that it can ....