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The Clean Air Act of 1963 (CAA) was passed as an extension of the Air Pollution Control Act of 1955, encouraging the federal government via the United States Public Health Service under the then-Department of Health, Education, and Welfare (HEW) to encourage research and development towards reducing pollution and working with states to establish their own emission reduction programs.
The Motor Vehicle Air Pollution Control Act (Pub. L. 89–272) amended the 1963 Clean Air Act and set the first federal vehicle emissions standards, beginning with the 1968 models. These standards were reductions from 1963 emissions levels: 72% reduction for hydrocarbons , 56% reduction for carbon monoxide , and 100% reduction for crankcase ...
Section 202(a)(1) of the Clean Air Act requires the Administrator of the EPA to establish standards "applicable to the emission of any air pollutant from…new motor vehicles or new motor vehicle engines, which in [her] judgment cause, or contribute to, air pollution which may reasonably be anticipated to endanger public health or welfare" (emphasis added). [3]
Under the Clean Air Act, states must abide by the federal government's standard vehicle emissions standards unless they at least partially opt to follow California's stricter requirements ...
The dispute over California vehicle standards centers on an exception granted to that state in 2022 by the U.S. Environmental Protection Agency during Biden's presidency to national vehicle ...
The civil penalty announced Friday would surpass the $1.45 billion Volkswagen paid in 2017 after the German automaker disclosed it had used defeat devices on 11 million vehicles worldwide ...
The Clean Air Act of 1990 required some states to enact vehicle emissions inspection programs. States impacted were those in metropolitan areas where air quality did not meet federal standards. [1] Some states, including Kentucky and Minnesota, have discontinued their testing programs in recent years with approval from the federal government.
The regulatory requirements of the Clean Air Act, which was amended many times, greatly restricted acceptable vehicle emissions. With the restrictions, vehicles started being designed more efficiently by utilizing various emission control systems and devices which became more common in vehicles over time.