Sky News: Scientists plead with PM on climate

'The 2007 IPCC report ... has unequivocally concluded that our climate is warming rapidly, and that we are now at least 90 per cent certain that this is primarily due to human activities,' the letter says.

The scientists say if the government does not legislate to cut emissions by 25 per cent of 1990 levels by 2020 then it 'will leave Australians with a legacy of economic, environmental, social and health costs that will dwarf the scale of national investment required to address this fundamental problem'.

The letter appears designed to pressure Senator Wong as she prepares to receive climate change adviser Ross Garnaut's final report on Tuesday.

Mr Garnaut earlier this month recommended Australia cut emissions only by 10 per cent by 2020.

'Other nations have taken action and have committed to further action,' the concerned scientists wrote in their letter.

Nov. 2007: Senator Elizabeth Dole succumbs to CO2 hysteria

If we are complacent, our children and grandchildren very well may face disastrous and irreversible environmental and economic consequences.