If you were faced with by far the biggest bill of your life, would you not want to be confident that there was a very good reason why you should pay it? That is why we need to know just how far we can trust the science behind the official view that the world is threatened with catastrophe by global warming – because the measures proposed by our politicians to avert this supposed disaster threaten to transform our way of life out of recognition and to land us with easily the biggest bill in history. (The Climate Change Act alone, says the Government, will cost us all £18 billion every year until 2050.)