Whether not the EPA should be allowed to do that is, in fact, a great question. But the Journal’s attempt to peg the agency’s tailoring rule as some epiphanic admission that limiting carbon emission poses economic challenges is naïve. The EPA is trying to address those challenges, yes—but it acknowledged them a long time ago.

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Curtis Brainard is the editor of The Observatory, CJR's online critique of science and environment reporting. Follow him on Twitter @cbrainard.