(March 1, 2017, 7:41 AM EST) -- BILLINGS, Mont. — A federal judge in Montana on Feb. 15 adopted a magistrate judge’s recommendation to award $1.5 million in attorney fees to environmental groups that partially prevailed in a suit accusing companies of violating the Clean Air Act (CAA), finding that the plaintiff groups were prevailing parties (Sierra Club, et al. v. Talen Montana, LLC, et al., No. CV 13-32-BLG-DLC-JCL, D. Mont., 2017 U.S. Dist. LEXIS 21515)....