Folks, if you think that there are no clear answers to replacing our dependance on oil and coal for fuel, then you need to take a look at these two web sites discussing updraft technology.
Australia, a country which relies almost solely on coal fired generators, and has to import the majority of their coal has the right idea, check out the following web site.
Look at these things! Could you imagine the scope of converting to this type of technology? It could be a public works project on a scale this country hasn't seen since Roosevelt's "New Deal"!
We can all just pussy foot around and pretend that cars and trucks that the auto industry now provide with double the gas mileage are the answer, or we can do the right thing and get busy building 1000 meter high monuments to humanity in the deserts of North America.