The secret world of amateur fusion
The idea of harnessing the process that powers the Sun has been a dream of scientists for decades – and it is easy to see why. Generating energy by fusing light nuclei together would produce little radioactive waste and no greenhouse gases. There is an almost limitless supply of fuel in sea-water and there would be no danger of nuclear meltdown. But actually making a practical fusion-energy source is a huge technical challenge, and massively expensive.