NIF’s target chamber, where a powerful laser is used to start nuclear fusion reactions. Photo by Jason Laurea/Lawrence Livermore National Laboratory (LLNL) December 15, 2022 Nuclear fusion may still be decades away, but the latest breakthrough could speed up its development Justin Wark, University of Oxford and Gianluca Gregori, University of Oxford A US national lab has proved we can the fusion process can be used to produce energy, but it’s just the first step in a very long process.