Reuters: Australia’s leading climate guru on Friday laid out a draft carbon trading scheme to rein in rising emissions in the world’s top per-capita greenhouse gas polluter. Economist Ross Garnaut, appointed by the government to design what will be the world’s most extensive emissions regime from 2010, said Australia was critically at risk from climate change and urged deep cuts in emissions from the world’s top coal exporter. But Prime Minister Kevin Rudd, who won a huge election …