Cars cause a lot of air pollution
How to reduce air pollution caused by vehicles
Sulfur dioxide SO2. There are four major pollutants that come from cars: A car emits carbon monoxide when the carbon in fuel doesn't burn completely. Although the U. The U. These pollutants react with nitrogen oxides in the presence of sunlight to form ground level ozone, a main ingredient in smog. Greenhouse gases trap heat in the atmosphere, which causes worldwide temperatures to rise. That said, many scientists believe that burning fossil fuels such as gasoline causes greenhouse gas levels to spike, leading to global warming.
Motor vehicles also emit pollutants, predominantly carbon dioxide, that contribute to global climate change. There are four major pollutants that come from cars: A car emits carbon monoxide when the carbon in fuel doesn't burn completely.
What percentage of air pollution is caused by cars
Cars and trucks emit carbon dioxide and other greenhouse gases, which contribute one-fifth of the United States' total global warming pollution. These pollutants form ground level ozone and particulate matter secondary. The following are the major pollutants from motor vehicles: Particulate matter PM. Exhaust emissions are created by the combustion of fuels when the vehicle engine is running or idling. Still, debate about pollution created by cars is usually related to exhaust emissions, combustion of gasoline or whether electric cars or hybrid cars are less polluting than fuelled cars. An estimated 3. If that wasn't enough, we pollute the air when we heat our homes and public buildings with fuels other than electricity -- just as we do when we drive our cars.
Gasoline fumes escape into the air even when we pump gasoline into our fuel tanks. Nitrous oxide contributes to the depletion of the ozone layer, which shields the Earth from harmful ultraviolet radiation from the sun.
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Evaporative emissions occur several ways: Diurnal — increased gasoline evaporation when temperature rises and the fuel tank is heated up. But the impacts of climate change, driven by global warming emissions, also affect people's health and the well-being of entire communities. As the United States moves more and more freight each year, the challenge of reducing emissions from this sector will continue to grow.
Cars, trucks and other forms of transportation are the single largest contributor to air pollution in the United States, but car owners can reduce their vehicle's effects on the environment.
Keep your vehicle well-maintained, with regular tune-ups and tire checks, and leave the car at home whenever you can.
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