"The Obama administration's efforts to clean up air pollution go on trial [Tuesday], as the Supreme Court and a federal appeals court review two landmark rules from President Obama's first term." [Note: Most federal offices are closed December 10 because of snow, but the Supreme Court will be hearing arguments nonetheless.]
"In one of the most high-profile environmental cases of the Supreme Court term, the justices will consider U.S. EPA's 2011 rule for air pollution that drifts across states lines. The agency asked the court to take the case after the U.S. Court of Appeals for the District of Columbia Circuit struck the rule down in August 2012.
The D.C. Circuit, meanwhile, will hear a broad challenge from industry groups and several states to EPA's December 2011 mercury and air toxics standards for power plants."