Reuters: Australia’s plans to introduce carbon trading from July 2010 would cut the country’s average gross national product growth by 0.1 percent, the Treasury department said on Thursday. “Average annual GNP growth will be only one tenth of 1 percent less than it would be in a world without action to tackle climate change,” Treasurer Wayne Swan and Climate Change Minister Penny Wong said while releasing Treasury data for the scheme. The modelling found the cost of curbing greenhouse …