Plenty has changed. The climate debate, so long polarised between zealots and deniers, has cooled. It is now (just about) possible to question the wisdom of an environmentalist policy without being denounced as a global warming denier. This applies to scientists, too: global temperatures have not been warming significantly for about 17 years now, encouraging a closer look at climate variability. The fracking revolution in the United States mean its natural gas prices have fallen to less then the average in Europe. As a result, heavy industry (and jobs) are flooding back to former rustbelt states. The scientific consensus has not changed: the planet is warming and mankind is, at least in part, responsible. Action is certainly needed. But how to help, without hurting too much?