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That said, many scientists believe that burning fossil fuels such as gasoline causes greenhouse gas levels to spike, leading to global warming.Scientists use sophisticated instruments to measure concentrations of harmful substances in the air, but it’s tough to say exactly what percentage of air pollution comes from cars.Hybrid cars, electric cars and alternative fuels will continue to help, but the sheer number of people -- and cars -- on the roads offset those improvements. If you have to get out of the house, combine trips for efficiency.
People are influenced by their style and performance as they wade through the streets and on the highways at top speeds.
Comfortable: Cars are epitomes of comfort with plush seats and climate control.
With the arrival of the automatic transmission, driving the car has become easier for the people.
According to the EPA, motor vehicles collectively cause 75 percent of carbon monoxide pollution in the U. The Environmental Defense Fund (EDF) estimates that on-road vehicles cause one-third of the air pollution that produces smog in the U. has 30 percent of the world's automobiles, yet it contributes about half of the world's emissions from cars.
S., and transportation causes 27 percent of greenhouse gas emissions. The United States was long considered the world’s biggest polluter in terms of carbon dioxide and other greenhouses gases, but by 2008, the United Nations had reported that China had moved into the top spot.