Obama power plant rules face key test in court

Reuters: The centerpiece of President Barack Obama's climate change strategy faced a key test on Tuesday as conservative appeals court judges questioned whether his administration overstepped its legal authority under an air pollution law to make sweeping changes to the U.S. electric sector.

Twenty-seven states led by coal-producer West Virginia and industry groups are challenging the Environmental Protection Agency's Clean Power Plan rules before 10 judges of the U.S. Court of Appeals for the District of Columbia Circuit.

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