Fusion – the act of deriving energy by smashing atoms together – has long been the stuff of science fiction. But thanks to a recent scientific breakthrough, there has been an increase in public excitement that one day, we might be able to use this as a continuous, clean source of energy.The catch? We might not get the technology before our 2050 net-zero climate goals arrive.Science Reporter Ivan Semeniuk explains exactly how fusion works and the Canadian efforts that are working to take this theory and turn it into a viable and widespread energy source.Questions? Comments? Ideas? Email us at thedecibel@globeandmail.com