Yes, the time scale will be long. Moreover, do we realize how embedded we all are in the fossil-fuel world? If the focus is on climate change caused by more CO2, then anyone who drives a car is just as guilty when he puts a foot on the accelerator and pushes the CO2 out the tailpipe. Living on the Princeton campus is one of the few places where a person can travel by walking and so feel a little bit self-righteous.
Yes, the time scale will be long. Moreover, do we realize how embedded we all are in the fossil-fuel world? If the focus is on climate change caused by more CO2, then anyone who drives a car is just as guilty when he puts a foot on the accelerator and pushes the CO2 out the tailpipe. Living on the Princeton campus is one of the few places where a person can travel by walking and so feel a little bit self-righteous.