

The biggest challenge the USA would face would be all the sabotage of the oil fields, Niagara Falls generating station, nuclear reactors, power plants, power lines going to the USA. The American army would also be over-extended meaning that China would make a play for both Taiwan and much of the eastern portion of Russian, specifically all of Russia’s Pacific coast, right up to Alaska.

Fewer cars, more green-space in the countryside, so not a huge worry. Cities should really focus on public transit; it fixes so many problems, no more drinking and driving, freeway congestion, traffic accidents, cost of owning car.