This is your kid on radiation.

U.S. doctors hit Tokyo radiation limit for kids
http://search.japantimes.co.jp/cgi-bin/nn20110502x1.html

Physicians for Social Responsibility, a U.S. nonprofit organization of medical experts, has condemned as "unconscionable" the Japanese government's safety standards on radiation levels at elementary and junior high schools in nuclear disaster-stricken Fukushima Prefecture.

"(Twenty millisieverts) for children exposes them to a 1 in 200 risk of getting cancer. And if they are exposed to this dose for two years, the risk is 1 in 100. There is no way that this level of exposure can be considered 'safe' for children," the statement said.

The pressure rises. If they can't attend school there, they can't really live there. If the kids can't live there, the parents (or in Japan, at least the mothers) need to leave, too. Once the children and women leave, the towns basically die. It's better (imo) to force evacuation of the contaminated ag areas anyway to keep toxic food out of the supply chain.