ELR Citation: ELR 20042
No(s). 06-1410 (D.C. Cir. Feb 24, 2009)

The D.C. Circuit remanded the U.S. Environmental Protection Agency's (EPA's) national ambient air quality standards (NAAQS) for fine particulate matter (PM). EPA failed adequately to explain why, in view of the risks posed by short-term exposures and the evidence of morbidity resulting from long-ter...