ACTIVISTS PAVE WAY FOR LITIGATION OVER STATE RULES ON 'UPSET' EMISSIONS

Environmentalists say they may file a lawsuit that could force EPA to overturn state rules on infrequent, large-scale industrial releases known as "upset" emissions, after one activist group issued a report charging that more than half of all states illegally exempt these events from enforcement under the Clean Air Act. Though the activists say that litigation could be years away, they argue they will have no choice if EPA and states do not take the initiative to regulate these emissions...