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Elements: Uranium

Uranium is the fuel for nuclear power stations, which generate carbon-free electricity, but also highly radioactive waste, posing a major dilemma for environmentalists.

Uranium is the fuel for nuclear power stations, which generate carbon-free electricity, but also radioactive waste that lasts a millennium. In the latest in our series looking at the world economy from the perspective of the elements of the periodic table, Justin Rowlatt travels to Sizewell in Suffolk, in a taxi driven by a former uranium prospector.

He is given a tour of the operational power station, Sizewell B, which generates 3% of the UK's electricity, by EDF's head of safety Colin Tucker, before popping next-door to the original power station, Sizewell A, where he speaks to site director Tim Watkins about the drawn-out process of decommissioning and cleaning up the now-defunct reactors.

But while Sizewell remains reassuringly quiet, the big explosions come at the end of the programme. We pit environmentalist and pro-nuclear convert Mark Lynas against German Green politician Hans-Josef Fell, the joint architect of Germany's big move towards wind and solar energy, at the expense of nuclear. Is nuclear a green option? It really depends whom you ask.

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