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Abstract An industrial and man-made activity has been raised to a great extent all over the world during the last decade. As a result air pollutants are generated in the atmosphere and causes our locally and globally environment. Most air pollutants originate from man-made sources, including both mobile sources (e.g., cars, buses, trucks) and stationary sources (e.g., factories, refineries, power plants) and some are released from natural sources such as dust storms. Pollutant may be classified according to their physical and chemical properties. They may be gaseous, e.g., nitrogen oxides and sulfur dioxide; or solid, e.g., soot, dust or present in aqueous solution, as for example, sulfuric acid in rain. It may have reducing capacity, e.g., sui fur dioxide, while others have oxidizing capacity, e.g., ozone; some may be acidic, e.g., hydrogen fluoride, while others are alkaline, e.g., cement dusts (Parker, 1978) I. Pollutants can be released and transferred from one area to another or when waste is emitted from a facility through smokestacks. The concentration of a pollutant decreases as it travels from the site of release. The amount of this dilution, or dispersion in air depends on weather, especially wind direction and speed and also on terrain, whether it is on flat or mountainous land or in a valley. Air pollution has a big influence on the air quality, human health and plants. It is the main cause of the green house effect, ozone depletion, photochemical smog and acid rain (Turk et al., 1983) 2. Toxic air pollutants enter the human body by ingestion, absorption through the skin or eyes and cause many health problems ranging from triggering of asthmatic attacks to the slow degeneration of lungs, from cancer to brain disorders |