when do you think we will be able to find a new substitute for fossil fuels?

Question: when do you think we will be able to find a new substitute for fossil fuels?
- Keywords:
  earth,
  energy,
  environment,
  fossil fuel
Asked by Meg_ to Angela, Claire, Ian, Robert, Sarah on 13 Nov 2014.
- Angela Stokes answered on 13 Nov 2014:
  
  Hi Meg_
  We are looking all the time for new ways of generating energy – there have been a huge number of wind farms and latterly solar farms springing up which go some way to reducing the amount of fossil fuel we use, but I don’t know whether we will ever find anything to completely stop our need for fossil fuel.

Question: when do you think we will be able to find a new substitute for fossil fuels?