الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Since 1970, vehicle’s exhaust pollutions have received increasing attention as a source of air pollution at both local (human health concerns) and global (global warming) scales. many alternatives including battery electric vehicles (BEVs) and other fuels like biofuels and hydrogen are being considered. However, all these alternatives start from a very low base and face very significant barriers to unlimited, this study mainly discusses diesel and gasoline vehicles because, today, over 90% of vehicles on the road use gasoline and diesel fuels. The major concerns of gasoline exhaust contaminants are carbon monoxide (CO), hydrocarbon (HC), carbon dioxide (CO2) and polycyclic aromatic hydrocarbons (PAHs); the major concerns of diesel exhaust emissions contaminants are nitrogen oxides (NOX) and particulate matter (PM), Before dealing with this pollution problem, it is needed to find out the danger of exhaust pollution and its composition, and also the damages of each component. The purpose of this thesis is appeal to the people all over the world to protect our one and only earth. However, solving the problem of car exhaust pollution is under high pressure, we need to take steps immediately. We hope that each of us will realize the importance of protecting the environment. Everyone should make a great effort to control automobile exhaust pollution.