The tokamak building at Iter will house the structure where fusion will be controlled The world’s biggest nuclear fusion project has entered its five-year assembly phase. After this is finished, the facility will be able to start generating the super-hot “plasma” required for fusion power. The £18.2bn (€20bn; $23.5bn) facility has been under construction in Saint-Paul-lez-Durance, southern France. Advocates say fusion could be a source of clean, unlimited power that would help tackle the climate crisis. Iter is a collaboration between China, the European Union, India, Japan, South Korea, Russia and the US. All members share in the cost of construction. Current nuclear energy relies on fission, where a heavy chemical element is split to produce lighter ones. Nuclear fusion, on the other hand, works by combining two light elements to make a heavier one. Nuclear fusion: ‘A question of when, not if’ This releases vast amounts of energy […]