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  2. Vehicle inspection in the United States - Wikipedia

    en.wikipedia.org/wiki/Vehicle_inspection_in_the...

    Vehicle emissions inspection station in Wisconsin. Arizona – biennially, in Phoenix and Tucson metro areas only, depending on age and type of vehicle. [28]California – biennially for all vehicles from out-of-state, regardless of age; and all vehicles made after 1975 which are more than six years old in all or some zip codes in 41 out of 58 counties.

  3. American Automobile Association - Wikipedia

    en.wikipedia.org/wiki/American_Automobile...

    This includes discounts for fuel-efficient vehicles and donations to environmental organizations. Also as a response to the critics, the California State Automobile Association , a branch of AAA, set up a booth at the San Francisco International Auto Show to raise awareness regarding plug-in hybrid vehicles .

  4. Vehicle emissions control - Wikipedia

    en.wikipedia.org/wiki/Vehicle_emissions_control

    NO x is a precursor to smog and acid rain. NO x includes NO and NO 2. [1] NO 2 is extremely reactive. NO x production is increased when an engine runs at its most efficient (i.e. hottest) operating point, so there tends to be a natural tradeoff between efficiency and control of NO x emissions. It is expected to be reduced drastically by use of ...

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  6. California Air Resources Board - Wikipedia

    en.wikipedia.org/wiki/California_Air_Resources_Board

    The California Air Resources Board (CARB or ARB) is an agency of the government of California that aims to reduce air pollution.Established in 1967 when then-governor Ronald Reagan signed the Mulford-Carrell Act, combining the Bureau of Air Sanitation and the Motor Vehicle Pollution Control Board, CARB is a department within the cabinet-level California Environmental Protection Agency.

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