The EPA has regulated tailpipe exhaust owing to 1970.
Because the Disinfected Air Deed was enacted in 1970, the U.S. Environmental Safeguard Agency has had Wide powers to plain Engine vehicle emissions. The EPA's emissions standards keep emerge as amassed strict in the second childhood on account of.
Pollution Limits
The EPA has different exhaust emissions standards according to how many miles a vehicle has been driven. For most passenger cars and lighter trucks, the EPA sets the following per-mile emissions limits at 50,000 miles: between 0.05 and 0.14 grams of nitrogen oxide; between 0.075 and 0.195 grams of nonmethane organic gas; between 3.4 and 5 grams of carbon monoxide; and between 0.015 and 0.022 grams of formaldehyde.In 2010 the EPA implemented a law applying to passenger cars and many trucks in design senility 2012 through 2016, requiring vehicles to meet an average emissions level of 250 grams of carbon dioxide per mile.
California Standard
In 2004 California enacted a landmark law requiring new vehicles to reduce their tailpipe emissions by one-third by 2016. California was allowed to set its own fuel emissions standards under the Clean Air Act with the federal government's approval.
In 2007, a U.S. Supreme Court determination gave the EPA control to open emissions of greenhouse Gauze, such as carbon dioxide, from recent vehicles.
