I don't agree that global warming is a problem. The globe has been cooling for the last 8 or 10 years and solar scientists are predicting that the cooling could go on anywhere from 10 to 80 more years. However, this video is a good primer on the energy it takes to run a modern civilization.
I like fusion power. And the best hope we have in the near term with respect to quick development and low cost fusion energy is Polywell Fusion. It is not a sure thing but neither are the ITER experiments. The one thing Polywell has going for it is that the development path is short (5 years for proof of concept vs 30 years for ITER) and the cost of energy from such a plant would be less than the cost of coal.
Bussard's IEC Fusion Technology (Polywell Fusion) Explained
Why hasn't Polywell Fusion been fully funded by the Obama administration?