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The star previously said he believed his controversial viewers on climate change may have cost him his television career.
In 2004 he dismissed global warming as “poppycock”.
In 2013 he told The Independent, “All of the work dried up after that.
“I was due to start another series with the BBC but that didn't go anywhere, and the other side [ITV] didn't want to know.
“I was shunned. They didn't want to hear the other side." But does he still believe he is right? "Absolutely."
He added that he still didn’t believe global warming was happening.
“It is not happening at all, but if you get the idea that people's children will die because of CO2 they fall for it?”
David was married to his wife Rosemary, who died last year.