EPA Warns Study On Air Act May Overestimate Benefits From PM2.5 Cuts

EPA is warning its air advisers of a flaw in its analysis for a draft report estimating a fivefold increase in the benefits of the Clean Air Act compared to a 1999 version of the report, saying the analysis includes a major statistical anomaly on fine particulate matter (PM2.5) emissions cuts that may exaggerate the air act's overall benefits by 10 to 20 percent. The anomaly, which the agency is vowing to take immediate steps to fix, is in a...