be left to decay the idea is that this final repository nears its geta will be able to contain the radioactivity for 300000 years. thomas how much is the technical manager here he s overseen the conversion of the concord mine into a functioning storage facility. now i have the chance as a journalist to visit the construction site nearly a 1000 meters below ground i have to carry a self rescue kit if necessary they will supply of oxygen to protect me against deadly mine gases. in the tunnels extend for many kilometers iron ore was mined here for more than a century until 976. we drive through the labyrinth of passageways. a journey through millions of years of rock and