‘…Coal mining in the Powder River Basin, which straddles Montana and Wyoming, has been economical only since the Environmental Protection Agency (EPA) began regulating sulphur dioxide in 1990; coal from eastern states is far more sulphurous. But a new rule from the EPA may be less well received here; on June 2nd it unveiled a proposal to cut emissions of carbon dioxide from power plants, which account for 39% of overall emissions, by 30% from their 2005 level by 2030.’
via Climate policy and the future of coal: Obama’s green gamble | The Economist.