Climate Change and Flooding

Lord Benyon Excerpts

Tuesday 15th December 2015 Commons Chamber

[David T. C. Davies (Monmouth) (Con)]

I am not sure into which category I fall, although I suspect that I know.

First, I express my sympathy to all those victims of floods—Monmouthshire has been affected by flooding in the past, of course—and all those who helped with the clean-up. However, I take issue with the idea that man-made climate change has caused all that. It is unfortunate that the two issues have been mixed up.

We have had few debates about global warming and climate change. Climate change has been with us for millions of years, ever since the Earth was created. I urge the Secretary of State for Energy and Climate Change to ask a few hard questions of those who are frankly displaying some hysteria about climate change. In the past 2,000 years, there have been periods of warming and cooling. It was warmer during the Roman period; it got cooler in the dark ages; it was probably warmer during the medieval period than it is now, and it got cooler again until about 1680, during the so-called little ice age.

One of the first questions to which the Secretary of State should find an answer is how much of the small amount of warming that has taken place in the past two centuries—about 0.8°—is down to man-made carbon emissions and how much is due to natural factors, such as the warming that must have taken place as a result of coming out of the little ice age.

[Richard Benyon (Newbury) (Con)]

rose—

[David T. C. Davies]

I have asked that question on many occasions and nobody could give me an answer, but I think that a former Minister is about to do so.

[Richard Benyon]

Ninety-five per cent. of climate scientists seem to suggest that man-made climate change is the problem. Many of us would like my hon. Friend to be right in his scepticism because that means that everything will be okay. Unfortunately, 95% of climate scientists, such as those we met at the Royal Society, disagree with him.

[David T. C. Davies]

I take issue with my hon. Friend. The 95% or 97% figure is floated around often, and I have done some research on it. It appears to have come from the Zimmerman/Doran survey, which was sent out to 10,257 potential respondents, who claimed to be climate scientists. Only 77 responded and 75 said, “I’m a climate scientist and it’s all down to man.” [Interruption.] If any other hon. Members know where the figure came from, they are welcome to let me know.

The IPCC’s most recent summary for policy makers has also put out some misleading statements. Page 17 of the “Summary for Policymakers 2013” states that it is extremely likely that more than half of the increase in global average temperatures from 1951 was caused by man. However, of that 0.8° figure, only about 0.5° comes from the second half of the 20th century. That means that, if the IPCC is correct, only just over 0.25° out of 0.8° was caused by man. That means that more than half is due to other, more natural factors.

My right hon. Friend the Secretary of State for Energy and Climate Change may also like to ask about the lack of firm correlation between the increases in temperature and those in carbon emissions. Even in the past 200 years, there has been a sharp increase in carbon dioxide, but there has not been a sharp increase in temperatures. They have gone up and down. They were going up between 1910 and 1940 and they were going down markedly between 1940 and 1977, leading many to believe that we were on the brink of another ice age. From the mid-1970s until 1997, temperatures were rising, as were carbon emissions, but from 1997 or 1998 until now, there has been a sharp increase in CO₂ but no increase in temperatures. We may wish to ask why that is.

I have had meetings with the Royal Society and the Met Office, and I recently asked that question of Professor Jim Skea—a lead author on the IPCC—in a public meeting at the House of Commons, chaired by Lord Deben. I asked why there had been no increase in temperatures for the past 17 or 18 years, and he said that that was statistically insignificant. That is a fair comment. He was not trying to say that this is about oceans or because the volcanoes are cooling, or any of the other many theories; he said that it is statistically insignificant, and he may have a point. However, if the past 17 years of no increase in temperature are statistically insignificant, why are the 27 or so years before that when there was an increase in temperature so statistically significant that we have to go ahead with all sorts of policies that will have a massive impact on homeowners and businesses in the UK?

Finally—I do not think anyone will be kind enough to intervene on me, although if someone wishes to, I shall be more than happy—