A war of words has erupted between Environment Minister Sammy Wilson and some of the world's top scientists following his claims that evidence on global warming has been covered up.
Last week he told the Environment Committee that a report by the Intergovernmental Panel on Climate Change — the world's leading authority on global warming — was doctored to remove arguments that human activity has little effect on the phenomenon.
One of the authors has now described the claim as ludicrous.
Martin Parry said: "To suggest that IPCC assessments are somehow falsified or doctored is ludicrous. In 30 years of research I have not seen any work more carefully and thoroughly done than that by the IPCC."
But Mr Wilson hit back saying his comments were based on criticisms made by some of the scientists whose work was cited in the report of the Summary for Policy makers, including Richard Lindzen who said the summary ignored uncertainty about global warming caused by humans.
"There is a total intolerance of any disagreement at all," he said.
"I'm not saying I'm 100% right — I'm saying that we need far more evidence because there is not the strength of evidence you need before you start spending billions of pounds on trying to reduce CO2 emissions which may have little or no effect."