Guardian: The British government will lose its leadership position on climate change and risk scuppering a global deal to cut emissions if it presses ahead with a new generation of dirty coal power, say leading US scientists and environmental leaders. The heads of three influential groups, representing more than 2 million members, have written to the foreign secretary, David Miliband, warning that the UK proposals for up to eight coal plants threaten the chance of the US joining a post-Kyoto …