"NEWBURG, MD - JUNE 29:  Two white ducks walk along the beach at Aqualand Marina as emissions spew out of a large stack nearby at the coal-fired Morgantown Generating Station on the Potomac River on June 29, 2015 in Newburg, Maryland. Today the U.S. Supreme Court ruled against the Environmental Protection Agency's (EPA) effort to limit certain power plant emissions -- saying the agency ""unreasonably"" failed to consider the cost of the regulations.  (Photo by Mark Wilson/Getty Images)"
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