Associated Press: The U.S. Environmental Protection Agency may take over the entire job of regulating air quality in Texas if the state continues to violate the Clean Air Act, a top EPA official told The Associated Press on Wednesday — intensifying a dispute over regulating pollution from the country’s largest refineries and petrochemical plants. The comment by regional EPA chief Al Armendariz comes a day after he said the federal government would issue the operating permit for one refinery in Corpus …