Australians are leading the charge of climate sceptics at the Copenhagen conference.
Family First Senator Steve Fielding will attend the summit next week - the same time as US President Barack Obama - to canvas his views that humans may not be affecting the climate.
It's not known if Senator Fielding will address the 15,000 delegates at the high-profile UN climate conference, which began on Monday.
The Victorian senator, who helped kill off the government's emissions trading scheme (ETS), will be at the summit as a representative of the US-based Committee For A Constructive Tomorrow (CFACT), which seeks to cast doubt on climate change. And Senator Fielding is not the only Australian climate naysayer to play a role at the conference.
Two Australian scientists will speak at a rival conference in Copenhagen on Tuesday, which will call for any climate treaty to be rejected.
One speaker will be prominent Adelaide scientist and author Ian Plimer, who wrote the book, Heaven and Earth, which rejects human-induced climate change.
And University of Western Australia geologist Cliff Ollier will speak on glaciers and ice caps at the two-day CFACT conference, which is being held away from the official conference venue. A policy adviser to former British prime minister Margaret Thatcher will also speak.
The leading role Australian climate sceptics are taking at Copenhagen comes as the opposition takes a more cautious line on global warming, ruling out support for an ETS.
Climate sceptics worldwide have been buoyed by the release of leaked emails from an English university which appear to show some climate data had been massaged to remove indications the world was not warming.
CFACT executive director Craig Rucker said the UN scientific process, which concluded climate change was real, was not fair or accurate.
"No climate treaty should be signed in Copenhagen this December," Mr Rucker said in a statement before the rival conference.
"It is important that delegates and the public get a chance to hear from these noted scientists and experts before they make a devastating mistake and ration energy, while having no effect on the climate."
Senator Fielding played a pivotal role in defeating the Rudd government's ETS because without his support, the government could not negotiate with the Senate crossbench to pass the scheme. The government then turned to the opposition, who voted down the scheme last month.
A total of 192 countries are attending the 11-day Copenhagen conference. At the summit's opening day on Monday, delegates from all over the world - including Australia - said they accepted the science of climate change and were ready to take action.
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