The politics of climate change can change quickly. For the last fortnight the Australian political sceptics have been encouraged to be sceptical because of those stolen email messages casting doubt on some scientific calculations. They were further emboldened because of a belief that the United States would not support an emissions trading scheme Tony Abbott has ended up Leader of the Opposition because of these factors.
Now the decision of the Environmental Protection Agency of the United States to declare greenhouse gases as a danger to public health has changed the rules. Some kind of broad agreement out of Copenhagen now looks possible with an ETS at its core.