Most people are aware of the things that cause pollution. Most people have heard terms like “carbon footprint” and “Environmental Protection Agency.” And most people know that the car they drive every day results in air pollution.
The EPA says that individual cars are not large polluters, but the millions of cars on the road every day add up to the single greatest polluter. That makes commuting a typical citizen’s most polluting daily activity.
There are four main types of pollutants in automobile exhaust:
The EPA has taken steps to reduce emissions and protect the environment, starting with the Clean Air Act of 1970. As emission standards tightened, auto makers responded with emission control systems, and eventually, hybrid and electric cars.
In many states, the DMV requires car emissions tests. These inspections make sure vehicles meet state emission and safety standards. In some states, the inspection must take place at the DMV, while some states authorize other locations to conduct the test. Nebraska does not require emissions tests, according to the DMV, but it does inspect other aspects of vehicles, such as the odometer and the vehicle identification number (VIN).
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