Leading climate scientists said this morning they were more certain than ever before that mankind was the main culprit for global warming and warned the impact of greenhouse gas emissions would linger for centuries.
A report, by the Intergovernmental Panel on Climate Change (IPCC), played down the fact temperatures have risen more slowly in the past 15 years, saying there were substantial natural variations that masked a long-term warming trend.
Commenting on the report, Telegraph columnist James Delingpole said: "All the computer models the IPCC has used in its 25 years have predicted global warming much greater than has been observed
"This represents a problem because what it means is all these insistent claims they have been making that we need to take urgent measures now to deal with this unprecedented problem seem to be based on junk science.
"The IPCC stands or falls on its computer models. There is no other evidence out there that global warming is any kind of problem. That it exists only in the imagination of the people who programme those computer models and the scientists who contribute to the theory that anthropogenic CO2 is a problem.
"What we see in this report is that the models aren't working, which suggests the entirety of AGW (Anthropogenic Global Warming) theory is flawed."