الفهرس 
acknowledgmentOnly 14 pages are availabe for public view
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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