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  Currently wind power is heavily subsidised by government and us the consumer, it is not an economically viable alternative; solar is getting cheaper from a micro generation perspective (i.e. at home) but is a limited option from a mass generation perspective for now, wave power is perhaps a longer term viable option but demands some serious engineering investment to get it to that stage and has a significant environmental impact in terms of altering tide patterns etc.
  
  Whilst long term fossil fuels are limited there is significant investment by the major players in finding ways to maximise yields from existing sources as well as research and development of alternative energy sources (biomass, algae, solar etc.) in the short term we need to build on the work of developing greater efficiency in use of fossil fuels (e.g. fuel cells for cars, coal fluid bed boilers for power stations etc.).
  
  Lesley is correct that we need to moderate demand, however all the studies I have seen suggest that for example the more efficient lighting becomes in terms of power consumption the more we use to light our homes so the power consumption does not drop, of course with a growing population it actually rises. It is a conundrum that is taxing many very clever people and our politicians.
  
  So sadly the short to medium term answer to our power demand issues is a limited increase in the use of nuclear power.

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