An attempt by environmentalists to limit CO2 emissions from coal-fired power plants in Wyoming has failed. The Wyoming Supreme Court ruled against environmentalists last week, as it concluded that CO2 is not "subject to regulation" under the Clean Air Act. Because it is not subject to regulation, the Clean Air Act's preconstruction pollutant emission reduction requirements do not apply. The court’s decision upholds the permit issued by the Wyoming Department of Environmental Quality for the Basin Electric Power Cooperative’s Dry Fork Station coal-fired power plant. The Sierra Club and Power River Basin Resource Council attempted to base their argument on a Georgia ruling, Longleaf Energy v. Friends of the Caloosahatchee, that determined CO2 was subject to regulation. However, even that ruling was overturned by the Georgia Court of Appeals, and a permit was granted without CO2 limits.