When cars burn gasoline, they emit pollutants. Gasoline fumes escape into the air even when we pump gasoline into our fuel tanks.
Emissions that are principal pollutants of concern include: Hydrocarbons HC - A class of burned or partially burned fuelhydrocarbons are toxins.
Hydrocarbons are a major contributor to smogwhich can be a major problem in urban areas. Prolonged exposure to hydrocarbons contributes to asthmaliver diseaselung diseaseand cancer. Regulations governing hydrocarbons vary according to type of engine and jurisdiction ; in some cases, "non- methane hydrocarbons" are regulated, while in other cases, "total hydrocarbons" are regulated.
Technology for one application to meet a non-methane hydrocarbon standard may not be suitable for use in an application that has to meet a total hydrocarbon standard. Methane is not directly toxic, but is more difficult to break down in fuel vent lines and a charcoal canister is meant to collect and contain fuel vapors and route them either back to the fuel tank or, after the engine is started and warmed up, into the air intake to be burned in the engine.
Carbon monoxide persistently binds to hemoglobin, the oxygen-carrying chemical in red blood cells, where oxygen O2 would temporarily bind; the bonding of CO excludes O2 and also reduces the ability of the hemoglobin to release already-bound oxygen, on both counts rendering the red blood cells ineffective.
Removing a person from a CO-poisoned atmosphere to fresh air stops the injury but does not yield prompt recovery, unlike the case where a person is removing from an asphyxiating atmosphere [i.
Toxic effects delayed by days are also common. NOx - Generated when nitrogen in the air reacts with oxygen at the high temperature and pressure inside the engine.
NOx is a precursor to smog and acid rain. NOx production is increased when an engine runs at its most efficient i. Particulate matter — Soot or smoke made up of particles in the micrometre size range: Particulate matter causes negative health effects, including but not limited to respiratory disease and cancer.
Very fine particulate matter has been linked to cardiovascular disease. Sulfur oxide SOx - A general term for oxides of sulfurwhich are emitted from motor vehicles burning fuel containing sulfur. Reducing the level of fuel sulfur reduces the level of Sulfur oxide emitted from the tailpipe.
Volatile organic compounds are a subsection of Hydrocarbons that are mentioned separately because of their dangers to public health. This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources.
Unsourced material may be challenged and removed. November Learn how and when to remove this template message Throughout the s and s, various federal, state and local governments in the United States conducted studies into the numerous sources of air pollution.
These studies ultimately attributed a significant portion of air pollution to the automobile, and concluded air pollution is not bounded by local political boundaries.
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At that time, such minimal emission control regulations as existed in the U. The ineffective local regulations were gradually supplanted by more comprehensive state and federal regulations. Both agencies, as well as other state agencies, now create and enforce emission regulations for automobiles in the United States.
Similar agencies and regulations were contemporaneously developed and implemented in CanadaWestern EuropeAustraliaand Japan. The first effort at controlling pollution from automobiles was the PCV positive crankcase ventilation system.
Positive crankcase ventilation was first installed on a widespread basis by law on all new model cars first sold in California.
Vehicle emissions control is the study of reducing the emissions produced by motor vehicles, especially internal combustion engines Types of emissions. Emissions These studies ultimately attributed a significant portion of air pollution to the automobile, and concluded air pollution is not bounded by local political boundaries. At that time. Vehicle Emissions and Air Quality. When a car’s engine is running, several different types of gasses and particles are emitted that can have detrimental effects on the environment. (23 July — New York, NY & Ann Arbor, MI) The use of lead in cars accounts for the largest remaining source of lead pollution, finds a new report released today. One car component, the lead starter battery, is responsible for the majority of current lead use in the world. Getting the Lead Out.
The following year, New York required it.Passenger vehicles and heavy-duty trucks are a major source of this pollution, which includes ozone, particulate matter, and other smog-forming emissions.
Automobiles and Pollution in India January 5, The automobile industry is one of the key drivers of the Indian economy. Since the liberalization of the sector in and allowing of percent FDI through automatic route, Indian automobile sector has come a long way.
Although the U.S. Environmental Protection Agency (EPA) declared cars "mobile sources" of pollution, they aren’t the only culprits. Big trucks, bulldozers, ships and .
In addition to having negative effects on human health, car pollution is detrimental to the environment.
Traffic policemen everywhere should wear pollution masks for their own safety and to arouse public awareness of the risk of automobile pollution. Automobiles include cars, trucks, motorcycles and boats (anything that burns gas).
They leave oil, antifreeze, grease and metals on streets and driveways. Most pollutants in water come from several different sources and are called Non-Point Source pollution.
Water picks up these pollutants as it flows over the land and goes through untreated storm drains or directly into streams, wetlands, lakes and the ocean. Water also carries pollutants into underground drinking water as it flows into the ground.