Dirty coal, it will never be clean; plus, we've been breathing toxic air for years, thanks to Ameren and Peabody, and collusion in the state regulators office (MODNR): U.S. Environmental Protection Agency Signals Intent to Reject Missouri DNR’s Weak Clean Air Designation at Ameren’s Labadie Coal Plant

U.S. Environmental Protection Agency Signals Intent to Reject Missouri DNR’s Weak Clean Air Designation at Ameren’s Labadie Coal Plant

Read more here. If you want to know what S02 is, why it's scary, and how the EPA is calling out the state of Missouri for "nonattainment" of acceptable air quality because of the coal plants, here's the EPA letter: http://www3.epa.gov/airquality/sulfurdioxide/designations/round2/07_MO_resp.pdf