On Friday, in Center For Biological Diversity v. EPA, the D.C. Circuit Court of Appeals struck down EPA’s rule deferring regulation of GHG emissions from “biogenic” sources. EPA had promulgated the rule, delaying regulation of emissions from biogenic sources from July 20, 2011, to July 21, 2014, on the ground that the carbon cycle is sufficiently complex that EPA is not yet in a position to judge what the actual carbon impact of different biogenic sources might be. … More