Controls on GHG emissions from mobile sources have been in place in the United S

Question

Controls on GHG emissions from mobile sources

have been in place in the United States since the Clean Air Act of 1970

were recently established by the EPA and the National Highway Traffic Safety Administration (NHTSA)

are implemented solely through CAFÉ standards issued by the EPA

apply solely to heavy-duty trucks and rail transport vehicles

have been in place in the United States since the Clean Air Act of 1970

were recently established by the EPA and the National Highway Traffic Safety Administration (NHTSA)

are implemented solely through CAFÉ standards issued by the EPA

apply solely to heavy-duty trucks and rail transport vehicles

Explanation / Answer

are implemented solely through CAFÉ standards issued by the EPA

Reason

EPA began regulating greenhouse gases from mobile and stationary sources of air pollution under the Clean Air Act for the first time on January 2, 2011. Standards for mobile sources have been established pursuant to Section 202 of the CAA, and GHGs from stationary sources are controlled under the authority of Part C of Title I of the Act.

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