By Alison George Has the self-styled “sceptical environmentalist” changed his mind about global warming? After all, he says we need $100 billion a year to counteract it First off, let’s get something straight. Exactly how sceptical are you about climate change? Man-made global warming exists. My problem is with the single-minded focus on drastic carbon emission reductions that have been promised in the 18 years since the Earth Summit in Rio, and have gotten virtually nowhere. What’s the alternative to this approach to cutting carbon emissions?