Caesium-137 alienation around the Chernobyl nuclear power plant. Together with caesium-134, iodine-131, and strontium-90, caesium-137 was among the isotopes distributed by the reactor explosion that constitute the greatest risk to health. The mean contamination of caesium-137 in Germany following the Chernobyl disaster was 2000 to 4000 Bq/m. This corresponds to a contamination of 1 mg/km of caesium-137, totaling about 500 grams deposited over all of Germany. In Scandinavia, some reindeer and sheep exceeded the Norwegian legal limit (3000 Bq/kg) 26 years after Chernobyl. As of 2016 the Chernobyl caesium-137 has decayed by half, but could have been locally concentrated by much
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