The Sierra Club and Environment Texas filed a federal lawsuit against Exxon Mobil Corp for five years of excess pollution at the nation's largest refinery, the Sierra Club said on Tuesday.

The lawsuit alleges Exxon's refinery and chemical plant in Baytown, Texas, committed over 2,500 violations of the U.S. Clean Air Act between 2005 and 2010 and released over 8 million lbs of pollutants into the atmosphere, said Neil Carman, clean air director of the Sierra Club's Texas chapter. If successful, the lawsuit could cost Exxon $81.25 million in fines, Carman said.

Read the complete Reuters story “Sierra Club sues Exxon over Baytown refinery pollution.”