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In the Clean Air Act as amended, Congress allowed California, which has serious problems with air quality, to adopt its own standards for emissions from cars and trucks, subject to the approval of the Environmental Protection Agency (EPA) according to certain standards. The Act also allowed other states to adopt California's standards after EPA approval.
Do the state emissions rules impose on the efforts of the federal government to address global warming internationally? Who should regulate GHGs, the states or the federal government? Both? Neither? Discuss.