it is all coming, solar power, solar heating to reduce other forms of energy use, wind power, tide power, cleverer ways to use hydro-electric sources, more effecient batteries....and, probably 'some' nuclear power, though I hate to see it. Even cheap solar stoves that work much like a magnifying glass for cooking in places where the trees are almost gone.

We must do these things in order to cope with the future and survive in any comfortable manner. If Global Warming IS, in fact, a reality for the next few decades or centuries, we need to plan now. If an ice age comes, we need to be ready...etc...

The other thing that needs to be considered is that we need to control (preferably reduce) the population in order to make better use of what energy we CAN produce, and to facilitate living in reduced areas if either ice age or serious warming happen.....