Fukushima Daiichi nuclear disaster (Unit 2 Reactor) the plant would be decommissioned once the crisis was over. The Japanese government estimates the total amount of radioactivity released into the atmosphere was approximately one-tenth as much as was released during the Chernobyl disaster. Significant amounts of radioactive material have also been released into ground and ocean waters. Measurements taken by the Japanese government 30–50 km from the plant showed caesium-137 levels high enough to cause concern, leading the government to ban the sale of food grown in the area. Tokyo officials temporarily recommended that tap water should not be used to prepare food for infants. In May 2012,
Radiation effects from the Fukushima Daiichi nuclear disaster used to produce bio-diesel, which could be used to produce electricity. According to director William Nolten the region had a big potential for the production of clean energy. Some 800,000 hectares in the region could not be used to produce food anymore, and after the disaster because of fears for contamination the Japanese people refused to buy food produced in the region anyway. Experiments would be done to find out whether camelia was capable of extracting caesium from the soil. An experiment with sunflowers had no success. High levels of radioactive caesium were found in 23 varieties of freshwater fish