But they won't until there is some form of coercion. The US is a nation of over consumers, it's almost like a addiction. I think it will take rationing to break well established habits. Petroleum first and foremost. If you had an allotment per month families would make adjustment and get by. You would re-think the quick trip to the store, maybe take a bike. Carpooling and mass transit would be utilized. The same thing with electricity. Nothing would move homeowners faster to solar that a set family energy allotment for each month. Maybe you'd re-think heating and air conditioning, perhaps control the temp in a small portion of the house. People would get by, nobody will like it, but everybody will be in the same boat.