Have you seen the newly released study on global temperatures? The previously available data only went back around 2000 years, but this goes back 11,000+ years. If we needed more incentive to begin acting dramatically right now, this is it. Andrew Sullivan calls it the “climate game-changer” and says:
To be perfectly frank, this graph shows our civilization to be unsustainable unless we dramatically alter its source of energy. Maybe we can adapt – in ways our ancestors did. But they were able to do so over much, much longer periods of time, and were not actually creating the situation.