The energy world is dangerously divided between the fossil fuel producers and the environmentalists. It's a vicious head-on fight between the world we currently live in and the low-carbon future for which more and more governments and peoples are aiming. It is a fight that affects everything - world poverty, the rise and fall of governments, environmental catastrophe, the largest businesses in the world - and your ability to work, to get the kids to school and to heat your home. It is a fight that, as things stand, no one can win. Here, David Howell - Lord Howell of Guildford - outlines the how we go here and the challenges ahead.