ACTIVIST group GetUp is taking on Sydney shock jock Alan Jones, demanding the broadcaster withdraw comments disputing the science of human-induced climate change.

The organisation is launching proceedings with the broadcast watchdog, demanding Jones publicly and immediately revoke what it calls fabricated statements.

"It's wrong for ultra-conservative shock-jocks like Mr Jones to deliberately mislead their audience," GetUp's acting national director Sam Mclean said today. "We have standards in this country which demand the truth from our broadcasters."

Action is also planned against another Macquarie Radio broadcaster, Chris Smith, organiser of today's anti-carbon tax rally in Canberra.

Under the Australian Communications and Media Authority's (ACMA) code of practice, broadcasters are required to make reasonable efforts to ensure that current affairs material, presented as factual, is reasonably supportable and to correct errors of fact at the earliest opportunity.

GetUp has set its sights on Jones over his comments that nature produces nearly all of the carbon dioxide in the atmosphere.

Jones has said that human beings produce .001 per cent of the carbon dioxide in the air.

GetUp argues that statement is factually inaccurate and prominent climate scientists have agreed that humans have contributed at least 28 per cent of atmospheric carbon dioxide.

"Alan Jones' complete disregard for providing a balanced view of climate change on his show is unacceptable," Mr Mclean said, adding that his organisation's research indicated the broadcaster had not interviewed any climate scientists who believe in the concept of human-induced climate change.

"This is completely unhealthy for public discourse and a perfect example of why the ACMA code was created in the first place."

Originally published as Activist group takes on shock jocks