“If we all jumped in Hummers and drove in circles and jerked up the thermostats or if we sat like the Buddah and didn’t use any fossil fuels, the climate system which is this huge bank of energy has so much momentum it won’t notice for 20 years. So that adds a horribly politically inconvenient time scale to this problem,” Revkin says. “Because you can’t cut a ribbon, fix it, and then get reelected based on that really smart choice you made.”