Changing the Game on Climate Change

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To get around Congress, President Obama will use executive power granted by the US Supreme Court to limit carbon emissions from power plants nationwide. The electricity industry and some business leaders are already counting casualties from what they call a "war on coal." Many environmentalists say it's about time. Others warn that the EPA's new regulations may be too little too late. Is the US finally taking world leadership against global warming? Is China watching what happens before the next climate summit in 2015?