"The door is closing ... I am very worried -- if we don't change direction now on how we use energy, we will end up beyond what scientists tell us is the minimum [for safety]. The door will be closed forever." That's Fatih Birol, chief economist at the International Energy Agency, upon the release this week of the IEA's World Energy Outlook 2011 report. According to the report, the world is likely to build so many fossil-fuelled power stations, inefficient buildings and energy-hungry factories in the next five years that it will become impossible to hold global warming to safe levels. If current trends continue then by 2015 at least 90% of the available "carbon budget" will be swallowed up by our energy and industrial infrastructure. By 2017, there will be no room to move at all -- the whole of the carbon budget will be spoken for, according to the IEA's calculations. Throw to the graphs. Our energy demand:

Room to move: