大象传媒

Engineers explain how nuclear fusion could provide us with energy for thousands of years with relatively little radioactive waste. At JET in Oxfordshire, engineers are fusing hydrogen isotopes to create energy to produce electricity. They explain how a tokamak uses magnetism to contain the very hot gases needed to obtain fusion, and the engineering materials needed to withstand the heat. They are helping to design a globally funded machine ten times the size of JET to allow them to get closer to a commercial fusion power plant. We hear from a Greenpeace spokesman who warns that we don't know how safe fusion power is and believes we should be concentrating on energy alternatives which are available now.