http://www.peakstoprairies.org/Network/News/index.cfm http://www.peakstoprairies.org/network/news/NewsItem.cfm?ID=1840 Six companies in Wyoming were cited for air pollution concerns by the Department of Environmental Quality, including excessive dust emissions, an unpermitted coal screen device and vapors escaping from natural gas field equipment. Sat, 15 Jun 2013 00:00:00 MST