EPA Finalizes Greenhouse Gas Endangerment Finding

Since the Supreme Court’s ruling in Massachusetts v. EPA, 549 U.S. 497 (2007), a row of regulatory dominoes have been poised to fall. On December 7, 2009, the finger of the EPA Administrator Lisa Jackson tipped the first when she issued the final GHG cause and endangerment findings. The endangerment finding states that the emission of six greenhouse gases (GHGs) constitute “air pollution” that “endangers” public health and welfare, based on the EPA’s determination that these emissions cause climate change, while the cause finding indicates that emissions from mobile sources contribute to the danger.

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