The U.S. Supreme Court heard oral arguments Feb. 24 in a significant environmental case in which the justices appeared to be split on whether the Environmental Protection Agency had the authority to develop greenhouse gas regulations for powerplants, refineries, and other “stationary sources.”
The justices did not appear willing to revisit the court's 2007 Massachusetts v. EPA decision, which said that EPA could regulate greenhouse gases if the agency found that they endangered public health.