[PvK]

Personally, I'd say the loss of petroleum and nuclear fuel would be good goals, if done without a catastrophe. They're both pretty foul. So would the reduction in the human population and land use by a factor of 10 or more. Hopefully, we won't have to destroy all our freedom and civilization to do so (although some of our civilization would be nice to lose, too, in my opinion). Also, although especially in the USA, we are massively car & gasoline oriented, I think that's also not necessary, nor desirable. I much prefer pedestrian-oriented communities, with as little exhaust pollution as possible.

PvK