Energy-Intensive Manufacturers Working Group on Greenhouse Gas Regulation v. EPA

The petition filed by the Energy-Intensive Manufacturers Working Group on Greenhouse Gas Regulation raised the question of whether EPA was statutorily required to regulate GHG emissions under the Clean Air Act’s Prevention of Significant Deterioration (PSD) and Title V programs, as well as related questions in connection with EPA’s obligation to consider alternative regulatory programs for GHG emissions from stationary sources and with the timeliness of challenges to the application of the PSD program to GHG emissions.