Environmentalists sue EPA to force San Joaquin PM2.5 cuts

Environmentalists are suing EPA for force the agency to issue a federal plan to curb fine particulate matter (PM2.5) in California’s San Joaquin Valley, after the state failed to supply its own plan required by the Clean Air Act to improve air quality in the area. In their suit filed Nov. 10 in the U.S. District Court for the Northern District of California, National Parks Conservation Association (NPCA), Sierra Club and six local groups say EPA has failed to issue...