If oil ran out would we turn to whater as fuel if not what would we use?

Question: If oil ran out would we turn to whater as fuel if not what would we use?
- Keywords:
  fuel,
  oil,
  water
Asked by sturmanm to David, Helen, Ian, rhysphillips, Sarah on 24 Jun 2011.
- Rhys Phillips answered on 17 Jun 2011:
  
  There are lots of renewable options – wind power, solar energy, water… and let’s not forget nuclear energy.
- Sarah Cook answered on 19 Jun 2011:
  
  We can already generate electricity from hydro-power schemes. But wind, solar etc are all viable forms of renewable energy that can be used to generate electricity.
- Ian van der Linde answered on 20 Jun 2011:
  
  To run cars, there is always biofuel (made from plants), or hydrogen (which we can make from algae, among other things), or just basic rechargeable batteries. For domestic energy, in the long run we’ll be using solar, wind and wave energy, but there are lots of short-term options besides burning oil, including nuclear and coal.
- Helen Fletcher answered on 24 Jun 2011:
  
  You can even use alcohol!

Question: If oil ran out would we turn to whater as fuel if not what would we use?