Powering Britain: Joe meets Britain's top energy man
18 June 2012 Last updated at 17:26 BST
Now we all know how important electricity is, giving us heating and light.
And every home in the country needs power and heat but where it comes from is currently up for debate.
Joe's already looked at coal, nuclear and wind power, as well as how we can get energy from plants.
But the ultimate decision on how Britain's powered will be made by the government - so Joe's been to meet their top energy man.