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How could anyone dispute the reality of climate change? With daffodils blooming in January and April temperatures higher than Beirut and Mexico, surely the evidence of global warming in our part of the world is all around us? And surely the need to do something about it is the largest single problem we face?

But what if our primary response to the challenge of climate change 鈥� cutting carbon emissions 鈥� is just plain wrong? Sitting here by the Thames in the hot sunlight flooding the House of Lords鈥� terrace is a man unafraid to answer that question. He says cutting carbon emissions won鈥檛 save the world, and it might just destroy our economy.

Lord Lawson 鈥� formerly just Nigel 鈥� is best remembered as Margaret Thatcher鈥檚 boom-and-bust chancellor, and for losing a lot of weight after leaving office. He re-emerged from the shadows in November when he delivered a stinging speech on climate change to the Centre for Policy Studies (CPS), a

right-leaning think tank. In it he questioned the assumption that the rise in average global temperature in recent years was evidence of widespread climate change, and said basing policy on unquantifiable science was irresponsible.

Scientists and environmentalists lined up to label the 75-year-old peer an irrational sceptic unwilling to accept the reality of global warming. Tony Juniper, Friends of the Earth鈥檚 executive director, said: 鈥淟ike the last of a dying race of dinosaurs, Lawson鈥檚 ideas are on a one-way journey to extinction.鈥�

Since his CPS speech, Lawson says he has been made a pariah 鈥� 鈥渁 heretic鈥�, he says 鈥� for speaking out on climate change. 鈥淚t has turned into a religion,鈥� says Lawson. 鈥淧eople like to believe in something and conventional religions don鈥檛 have the hold on people in this country as they once did. This is the new religion, but I don鈥檛 think that is a basis for sensible decisions.鈥�

Lawson has questioned the authority of UN scientific body the Intergovernmental Panel for Climate Change (IPCC), although his chief concerns are not the scientific evidence but how the world is reacting to the threat of climate change. 鈥淭he real question is what is, in practical and economic terms, the most cost-effective way to deal with what鈥檚 happening 鈥� is it to cope, or is it to try and stop the world getting warmer?鈥� he asks.

Attempting to do the latter is extremely problematic, according to Lawson. To curb emissions would need worldwide agreement to cut the use of carbon-based fuels, which Lawson says developing countries such as China and Brazil will never agree to. Mere concessions to reduce emissions will not be enough. To achieve the aims outlined in Sir Nicholas Stern鈥檚 review on the economics of climate change, the UK must reduce the use of carbon-based energy by 60% before 2050. 鈥淭here would have to be a complete transformation. It鈥檚 not just gestures like turning off the standby on your television. This is a massive change that can only be achieved by making carbon-based energy so expensive that low-carbon energy sources will become economical.鈥�

The only way to do this, he argues, is by levying an extremely heavy carbon tax 鈥� a cost that no government would be foolish enough to impose on its electorate. 鈥淚 don鈥檛 see that happening. What we have to do is use a bit of common sense and adapt to the changes that are happening.鈥�

The idea is for us to lead the world in cutting carbon. I can assure you that if we do, nobody will follow, and it鈥檒l just damage the people and industry in this country to no purpose

The idea of adaptability was another feature of Lawson鈥檚 speech to the CPS. Instead of spending billions trying to stop climate change, we should invest money in dealing with the global transformations that would ensue if the IPCC鈥檚 predictions came to pass. The 鈥渃entral guess鈥� of the IPCC鈥檚 assessment, says Lawson, is that the world鈥檚 average temperature could rise by 2.5潞C over the next century. As an example of how humans adapt, he compares two cities: Helsinki, with an average temperature of 5潞C, and Singapore, with an average of 27潞C. If human beings can thrive in temperatures as varied as this, Lawson argues, there is no reason why a 2.5潞C rise over a century should be unmanageable. 鈥淚n different parts of the world, in different climates and in different periods of time when the climate has been different, man has managed to adapt,鈥� he says.

He adds that modern technology 鈥� for example, improved agricultural techniques 鈥� will come into play to combat the inevitable rise in temperature. Lawson says flood defences and water management are more than advanced enough to cope with Stern鈥檚 predicted quarter of an inch rise in sea levels: 鈥淚t鈥檚 what the Dutch have been doing for hundreds of years,鈥� he says.

Given that Lawson thinks human beings are capable of weathering the storms that climate change will bring, it鈥檚 no surprise to learn that he thinks the government鈥檚 decision to legislate on the matter is irresponsible. The draft Climate Change Bill, recently drawn up by the government, commits the country to the 60% emission reduction target recommended by the IPCC. 鈥淚t鈥檚 crazy,鈥� he says. 鈥淭he idea is for us to lead on this issue. I can assure you that if we do lead, nobody else will follow and it鈥檒l just damage the people and industry in this country to no purpose.鈥�

Lawson warns that if the UK goes ahead with its planned carbon reduction commitments, energy will become much more expensive here than in the developing world. Industry will relocate to where energy prices are cheaper and the net carbon emissions will remain unchanged.

As well as being economically damaging, the government鈥檚 plans are also ethically unbalanced, he says: 鈥淭he IPCC鈥檚 most conservative model suggests that in 100 years鈥� time, living standards and GDP per head for the world will be about seven times what they are today. So, to tell the people of this generation that they鈥檝e got to make sacrifices to benefit people who are going to be substantially better off than they are, is, I think, a difficult proposition to sell.鈥�

It isn鈥檛 only the Labour government that is trying to sell this particular proposition to the British people. The so-called 鈥渘ew Conservatives鈥� are just as concerned about the environment. Indeed, they claim to have set the agenda. Lawson seems unconcerned about his party鈥檚 stance. 鈥淚t鈥檚 the zeitgeist 鈥� it鈥檚 something that goes down well with the media and it鈥檚 the mood of the moment,鈥� he says. 鈥淏ut when it comes to living up to their rhetoric with huge carbon taxes, I think they will find they鈥檝e lost public support.鈥�

Lawson recalls the Club of Rome, a group of environmentalists started in the seventies who warned that the earth鈥檚 resources were running low. 鈥淭his kind of madness has happened from time to time in the past,鈥� he says. 鈥淚t was thought then that there would be severe shortages of all raw materials and unless something was done, there would be mass starvation, pestilence and wars.鈥�

It didn鈥檛 happen, and although the Club of Rome still exists, nobody is making laws based on their predictions. In Lawson鈥檚 opinion, the green debate is a passing fad that will soon fade into the national memory. 鈥淧eople get carried away by these things, and eventually as time goes by, they realise how foolish they鈥檝e been. People will come to their senses, but it will take a bit of time.鈥�