when fossil fuels run out what do you think the next sustainable thing will be?

Question: when fossil fuels run out what do you think the next sustainable thing will be?
- Keywords:
  energy,
  environment,
  fossil,
  fuel,
  global warming,
  green,
  planet,
  power,
  renewable,
  sustainable
Asked by henry123 to Murray on 21 Mar 2011 in Categories: Your Research.
- Murray Collins answered on 21 Mar 2011:
  
  Hi Henry
  
  Have a look at my answer here: http://ias.im/35.1640
  
  If you want to ask another question, give me a shout!

Question: when fossil fuels run out what do you think the next sustainable thing will be?