Wednesday, September 11, 2013
Types of Harmful Car Emissions
Modern cars have extensive systems to increase fuel economy, regulate combustion and control emissions, but the resulting exhaust still contains many harmful substances. As an engine burns gasoline, it produces exhaust that contains carbon dioxide, carbon monoxide, nitrogen oxide and hydrocarbons. These substances adversely affect health and the environment.
Carbon Dioxide
Vehicles running on gasoline produce carbon dioxide as a waste product. Carbon dioxide doesnt directly cause health problems, but it is a greenhouse gas and research has determined that carbon dioxide is partially responsible for climate change. In response, governments around the world have implemented plans to reduce carbon dioxide emissions.
Carbon Monoxide
Vehicles produce carbon monoxide instead of carbon dioxide when fuel isnt completely combusted. Red blood cells absorb carbon monoxide quicker than oxygen. Carbon monoxide poisoning occurs when enough oxygen has been displaced in the bloodstream to interfere with normal respiration. Sustained exposure to high levels of carbon monoxide results in death.
Hydrocarbons and Nitrogen Oxide
Vehicle emissions contain hydrocarbons and nitrogen oxide. Hydrocarbons and nitrogen oxide react in the presence of sunlight to create ozone. Ground-level ozone creates smog and causes health problems. Exposure to ozone may worsen chronic conditions like asthma or emphysema, and prolonged exposure scars lung tissue.
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