As reactors and waste grow, Finland’s fix is a lone example. Sixty nuclear power plants are under construction worldwide, and a further 110 are planned. Yet no one really knows what to do with the lethal waste. It’s been piling up for decades. Now, in a giant network of tunnels 450m underground, the Finns say they have the world’s first permanent solution.Lucy Hockings talks to the BBC’s Adrienne Murray, who has toured the tunnels, and Graihagh Jackson, from The Climate Question podcast.The Global Story brings you trusted insights from BBC journalists worldwide. We want your ideas, stories, and experiences to help us understand and tell #TheGlobalStory. Email us at theglobalstory@bbc.com. You can also message us or leave a voice note via WhatsApp on +44 330 123 9480.TGS is part of the BBC News Podcasts family. The team that makes The Global Story also makes several other podcasts, such as Americast and Ukrainecast, which cover US news and the war in Ukraine. If you enjoy The Global Story, then we think that you will enjoy some of our other podcasts too. To find them, simply search on your favourite podcast app.This episode was presented by Lucy Hockings. It was made by Pete Ross and Neal Razzell. The technical producer was Mike Regaard. The assistant editor is Sergi Forcada Freixas, and the senior news editor is Sam Bonham.