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Page last updated at 09:45 GMT, Thursday, 12 November 2009

Does CO2 cause climate change?

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Next month's Copenhagen environmental summit will hear a good deal about ways in which the world must and should combat carbon emissions in order to save the planet. But others say that the fundamental premise - that global warming is caused to a significant extent by carbon emissions and that we can do something about it -- is wrong. Professor Ian Plimer from Adelaide University in Australia is among the sceptics.

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