WTF?
SourceWatch is published by the " Centre of Media and Democracy" and they state that they provide well-documented information about corporate public relations (PR) campaigns, including corporate front groups, people who "front" corporate campaigns, and PR operations.

This is what they say about Ian Plimer.

Plimer's denialist book on global warming was universally panned by scientists as full of errors and even accused of plagiarism.

Plimer debated George Monbiot and one observer noted "For Plimer, it was an unmitigated disaster. He fudged and distracted at every turn like a senile old goat. In the end, he refused to answer a single question put to him by Monbiot or the moderator. His credibility - and that of his book - withered away into oblivion."

They also state: "...couldn't help noticing on page120 an almost word-for-word reproduction of the abstract from a well-known loony paper...[that] argues that the sun isn't composed of 98 per cent hydrogen and helium, as astronomers have confirmed through a century of observation and theory, but is instead similar in composition to a meteorite.

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Other claims made by SourceWatch about Plimer...

"...finds it "rather strange" that Plimer argues for volcanoes as the cause of rising CO2, after trying to convince his audience that CO2 is an unimportant trace gas and doesn’t change climate anyway."

"... Plimer stated that "volcanoes that leak out carbon dioxide have caused global warming in the past", a statement that starkly contrasts with his later claims that CO2 levels have no effect on climate."

"...Plimer claimed that white asbestos, known as chrysotile, is not really asbestos, whereas the U.S. Department of Health and Human Services calls it the most common form of asbestos. Plimer went on to assert that chrysotile is not a carcinogen, even though in 2008 the WHO (World Health Organisation) said it was a carcinogen, and so do medical authorities throughout the world."

Plimer even lost a court case against the creationist minister Allen Roberts despite the fact that the court ruled that Roberts made false and misleading claims.

There is more but somehow I think that Plimer will remain the poster-boy for denialists.