A radiation monitor indicates 0.41 microsieverts per hour at Mutsuo Mito's dairy farm in Shinchimachi, Fukushima Prefecture, northern Japan, April 13, 2011, located about 50km from the tsunami-crippled nuclear reactor. Mito's farm has been throwing away about 1,200 litres of fresh milk daily and he has submitted milk samples to the government twice already, but have yet to receive a response as to whether they will be allowed to sell their milk since shipments of unprocessed milk . Generally, people are exposed to about 1 to 10 millisieverts of radiation a year from natural background radiation, caused by radioactive substances in the air and soil. One thousand microsieverts make 1 millisievert. [Xinhua/Reuters Photo] |