Australian: AUSTRALIA should pledge to cut its greenhouse emissions by 10 per cent by 2020 if the world clinches a climate change agreement at Copenhagen. It should pledge to cut by 5 per cent even if the international community only manages a partial deal, the Rudd Government’s chief climate change advisor Professor Ross Garnaut says. The first publicly available results from the Treasury’s emissions trading modelling reveal that a 10 per cent emission reduction would reduce Australia’s …