Midwest Generation’s [part of Edison International] very old, highly-polluting Fisk and Crawford coal plants in Chicago are located in more densely populated communities than are any other coal plants in the United States...[T]hey are some of the oldest coal plants operating in the nation. The Federal Clean Air Act allows coal plants constructed before 1976 that have not since been modified to defer achieving the more stringent pollution limits that are imposed on newer plants. This includes emission limits on pollutants such as particulate matter, among others...Chronic exposure to PM can cause serious health problems and premature deaths...The National Research Council’s recent study applied an economic model to estimate damages caused by air pollution at 406 coal plants...[The] Council determined that the health and environmental-related damages from these coal plants cost the public in excess of $127 million...per year...The Fisk and Crawford coal plants operate in...predominantly Latino neighborhoods...