States have a right to protect their citizens’ health from harmful tailpipe pollution.

Clean air leadership in the United States happens at the local level. The Clean Air Act enshrines the authority of states to adopt stronger-than-federal clean car standards to address their unique air quality and public health problems.

State clean car standards are supported across the U.S.

If you add all of the states who have either joined litigation to protect the standards or vowed to reduce their greenhouse gas emissions, they represent 49 percent of U.S. vehicles. If you add new vehicles from cities voicing opposition to the rollback (outside the states already counted) that means all these climate-protecting states and cities amount to more than half (55 percent) of the U.S. auto market.

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