Australia's top climate advisor is laying out the cost and timeframe of his proposed emissions trading scheme.
Climate guru Professor Ross Garnaut is once again fronting the National Press Club, to update Australians on his draft plan for an emissions trading scheme.
Professor Garnaut has advised the scheme start in 2010, with an initial carbon price of $20 a tonne, to rise by four per cent a year.
He's also recommended overall greenhouse gas emissions be cut between 10 and 20 per cent by 2020.
"Australia's population, because of the country's long-standing and large immigration program, has been and will be growing much faster than populations in other countries," Professor Garnaut said.
"The allocation formula ... accommodates Australia's rapid population growth."
Australia is the world's 16th largest carbon polluter, and the Government is already committed to begin emissions trading within two years time.