Decontamination of a school playground after Fukushima
After the Fukushima accident, many schoolchildren parents demanded to the Japanese government that playgrounds were cleaned so that their children may not be exposed to doses exceeding the legal limit of 1 mSv / year. Engines have scraped tis playground to collect the potential deposit of cesium its surface. The limit of 1 mSv is conservative. The Japanese, whose life expectancy is highest in the world, receive five times more on average because of medical diagnoses.
Ko Sasaki for The New York Times