A flurry of stories today — see, e.g., here — report the results of a study that claims carbon (read: auto emissions) is at fault for pollution-related heart problems. The study lets sulfates (read: power plants) off the hook.

Reuters calls the Electric Power Research Institute, which conducted the study, an “independent, non-profit center for public interest energy and environmental research.” According to Geoffrey Johnson over at The Green Life Blog, a little more skepticism is warranted.