Just think about it - where do you think power will come from for all these people? Are you suggesting that they will get rid of housing etc to put up fields of solar and windmills?? Also, are you saying that the Guvnuts will build hydro schemes when the "pundits" are telling us AGW means there will be no rain and "what rain falls will not even fill the dams"??
So it is back to oil/gas/coal (ALL fossils) unless something comes from the left field. Of the three my money is on coal.