At the moment, more then 90% of Britain's energy needs are met by burning fossil fuels or generated in nuclear power stations. Unfortunately, there are not renewable sources of energy, and once they have run out, that's it. More importantly, though, these methods of electricity generation are harmful to the environment. They emit harmful greenhouse gases, which contribute to global warming and climate change. How then can we produce enough energy to power an entire country without damaging the environment? What can we use as an alternative, reliable frow of energy, which will generate as much power as fossil fuels and nuclear energy, but have none of the drawbacks?