Simon Donner makes a disturbing point:
If you look at the global fossil fuel emissions data, all of the major disruptions to energy and oil use in the past 60 years caused carbon emissions to drop or level off. Annual emissions would later continue to rise at a rate similar to that before the disruption, but the total annual emissions would not “catch up” to where it “would have been” without the disruption.
The recent world financial crisis appears, on the surface at least, to be an exception. Carbon emissions stopped rising in 2008 and 2009, but rebounded so strongly in the past couple years, that emissions have reached the level to which they appeared to be headed, presuming linear extrapolation, before the crisis.