The good news in the International Energy Agency's report on the future of energy technologies is that there is enough oil left on the planet to allow a huge increase in consumption over the next few decades. The bad news is that the consequences for the climate of burning that much oil would be alarming. The IEA, the rich countries' energy watchdog, is urging the world to start weaning itself off oil, not because supplies are running out but to avoid "significant change in all aspects of life and irreversible change in the natural environment" as a result of global warming.