Radioactivity is persisting in the ocean waters close to Japan's ruined nuclear power plant at Fukushima Daiichi.
New data presented at a conference held on 12–13 November at the University of Tokyo show that levels of radioactivity in the sea around the plant remain stable, rather than falling as expected. Researchers believe that run-off from rivers, as well as continued leaks from the plant, may be partially to blame. But contaminated sediment and marine organisms also seem to be involved.
The level of contamination is not likely to pose a significant health risk to humans. But it could have long-term economic consequences for fishermen along Japan's east coast.
Read more: http://www.nature.com/news/ocean-still-suffering-from-fukushima-fallout-1.11823