if we run out of fossil fuels where and how would we get enrgy from??

Question: if we run out of fossil fuels where and how would we get enrgy from??
- Keywords:
  energy,
  fossil fuels,
  run out
Asked by willchristtmass to Nicolas on 12 Jun 2011.
- Nicolas Biber answered on 12 Jun 2011:
  
  This is a very important question, because eventually we will run out of fossil fuels, and nobody really knows when that will happen. People are working on drawing energy from other sources like wind, waves, the tides and the sun, and they all work pretty well … but I believe that the real way forward is not to produce more energy but to use less. If everyone of us cuts down the whole world will need less energy. This will preserve our valuable fossil energy sources for a longer time, and there will also be less pollution.

Question: if we run out of fossil fuels where and how would we get enrgy from??