The D.C. Circuit denied an electric utility association's petition for review challenging EPA's new source performance standards for steam generating units. The standards—issued via final rules in 2009 and again in 2012—exempt all units using particulate matter continuous emissions monitoring sy...

The Washington Supreme Court upheld the state environmental agency's determination that an EIS was not necessary for a proposed biomass cogeneration project at a kraft pulp and paper mill. An environmental group argued that by not preparing an EIS, the agency failed to adequately consider the effect...

A district court granted in part and denied in part motions to dismiss an environmental group's citizen suit against a utility company for alleged CAA violations at a coal-fired power plant in Muskogee, Oklahoma. The group alleged that the company failed to obtain a prevention of significant deterio...