Reuters: The Australian government on Monday ruled out following Britain with a tougher target for carbon emissions by 2050, saying business needed certainty over targets in the run-up to carbon trading. Climate Change Minister Penny Wong said Australia had set an ambitious target to cut in greenhouse gas emissions by 60 percent by 2050, and the target would not change. “The government position is that 60 percent, particularly for an economy like Australia’s, is an ambitious target,” …