Two and a half years ago an earthquake and then tsunami devastated Japan. But it was the tsunami that crippled the Fukushima nuclear power station and created the world’s worst nuclear disaster since Chernobyl. Unfortunately things are still not working properly and the plant is still leaking radioactive particles into the local environment. This interactive guide from the Guardian illustrates just what Tepco, the power company responsible for the plant, is trying to do to prevent further radiation from leaking into the ocean.

Credit for the piece goes to Paddy Allen and the Graphic News.