By Emily Gertz
There’s a steady, low, background level of radioactivity we encounter in everyday life. Some of it is human-made but very diffused, born out of the atomic and nuclear testing of the mid-20th century. Some of it is created naturally: radon gas seeping from marble floors, for instance, or the increased dose of cosmic rays that airline passengers get during a flight. Few people think about these exposures. But since Japan’s Fukushima Daiichi nuclear power plant disaster in March 2011, there’s been worldwide concern that the plant contaminated Pacific Ocean seafood enough to affect human health.
During the disaster, explosions in reactor containment buildings sent clouds of radioactive steam into the atmosphere, which drifted over land and sea. In the months and years since the original explosion, leaks of radioactive water from the site have flowed into the ocean as well. Read Full Article