“On April 2, 2007 the Supreme Court released its ruling in the case of the state of Massachusetts vs. the Environmental Protection Agency. Massachusetts and eleven other states, along with several local governments and non-governmental organizations (petitioners), sued the EPA for not regulating the emissions of four greenhouse gases, including carbon dioxide (CO2), from the transportation sector. The petitioners claimed that human-influenced global climate change was causing adverse effects, such as sea-level rise, to the state of Massachusetts. In a 5-4 decision, the court ruled in favor of Massachusetts et al, finding that EPA has the authority to regulate CO2 and other greenhouse gases. The decision was written by Justice Stevens and was signed by Justices Kennedy, Souter, Bader Ginsburg, and Breyer. Chief Justice Roberts and Justices Alito, Scalia, and Thomas dissented. ” (Read more from Pew Center Global Climate Change).
Listen to Science Friday podcast on the ruling.