A lawsuit filed against the Environmental Protection Agency (EPA) by seven states is seeking to force the federal agency to impose stringent new regulations on residential wood-burning heaters, which they claim “can increase particle pollution to levels that cause significant health concerns.” (See EPA wood-burning lawsuit.pdf) The lawsuit, filed last month in U.S. District Court for the District of Columbia by the attorneys general of Connecticut, Maryland, Massachusetts, New York, Oregon, Rhode Island, and Vermont, is directed against currently unregulated “indoor and outdoor wood boilers,” which have become an increasingly popular way to heat homes, particularly in rural areas.