In the Chernobyl nuclear accident of 1986, the biggest health effect was cases of thyroid cancer, especially in children living near the nuclear plant in Ukraine.

A girl contemplates a picture of broken dolls at an exhibition in the Swiss city of Geneva marking the 25th anniversary of Ukraine's Chernobyl nuclear disaster.

Sweden imposed a moratorium on new reactors after Three Mile Island; other countries, like Germany and Italy, committed to phasing out nuclear power after Chernobyl.