Scalia, who wrote the majority opinion, added that the agency “sought to regulate sources it said were responsible for 86 percent of all the greenhouse gases emitted from stationary sources nationwide. Under our holdings, EPA will be able to regulate sources responsible for 83 percent of those emissions.”
Scalia was joined by Chief Justice John Roberts Jr. and Justices Anthony Kennedy, Ruth Bader Ginsburg, Stephen Breyer, Sonia Sotomayor and Elena Kagan in the 7-2 ruling.
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