Solar, from orbiting collectors beamed to earth by microwaves. The collector NASA designed would generate 1.2 billion watts. As for portable sources Hydrogen.
Solar, Hydro, Wind.
Those are the only practical ones.
The key is getting infrastructure in place.
From wind energy and Solar energy.
many are there but none is suitable replacement for fossil fuels
The only one that will ever really be practical: nuclear fusion.
Guys I need the answer fast because i have to finish my chemestry target!!!!!
