1.) Effects Of Mobile Sources On Global Warming, The Environment

1282 words - 5 pages

1.) Effects of mobile sources on global warming, the environment and humans Mobile sources, the leading contributor of air pollution, produce several important air pollutants, such as, air toxics and green house gases. Air toxics are pollutants known or suspected to cause cancer or other serious health problems such as heart problems, asthma symptoms, eye and lung irritation, and premature death. Air toxics are also harmful to the environment, Greenhouse gases such as carbon dioxide (CO2) trap heat in the earth's atmosphere contributing to global climate change.Benzene a component in gasoline is a cancer-causing hydrocarbon (CGHG) derived from petroleum. Benzene emissions occur in exhaust as a byproduct of fuel combustion and also occur when gasoline evaporates.Carbon monoxide (CO) is a colorless, odorless gas that forms when carbon in fuel is not burned completely. CO is a component of exhaust from motor vehicles and engines. When condition are poor for combustion carbon monoxide emission increase. Poor conditions are when it is very cold and at high elevations where there is less oxygen in the air to burn the fuel. Carbon Monioxide reduces the ability of blood to bring oxygen to body cells and tissues. It is more hazardous to people who have heart or circulatory problems and people who have damaged lungs or breathing passages.Nitrogen oxides form when fuel is burned at high temperatures such as in motor vehicle engines. Mobile sources are responsible for more then half of nitrogen oxide emission in the United States. Nitrogen oxides can travel long distances, so that non-urban areas can also be highly affected. Nitrogen oxide causes health and environmental problems such as ozone and smog along with contributing to the formation of particle matter in the earth's atmosphere.Particulate matter is tiny particles or liquid droplets suspended in the air that can contain a variety of chemical components. Virtually all particulate matter from mobile sources in PM2.5, particulate matter that are less than 2.5 microns in diameter. Particulate matter is caused by diesel vehicles and by road dust suspended in the air by moving vehicles. These particles are the leading contributor to haze and are generally more harmful to human health because they can penetrate more deeply into the lungs. Particulate matter can cause nose and throat irritation, lung damage and bronchitis.Insert 3 Pie charts!!!!! Hydrocarbons Nitrogen oxides Particle matter 2.) Energy consumption The petroleum shortages caused by OPEC in 1973 began the world's search for more efficient homes, factories, and transportation systems. Almost thirty years later, residential energy use is about the same, industrial energy consumption is down, and transportation energy use is up. Transportation consumes more than 20% of the world's total primary energy and produces much of the world's air pollution. In the next thirty years the amount of cars on the world's roads is predicted to double. This will...

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