Chernobyl disaster
It is difficult to accurately tally the number of deaths caused by the events at Chernobyl. A 2005 IAEA report tells of 56 direct deaths; of those, 47 were accident workers, and 9 were children who died of thyroid cancer. The report thinks that up to 4,000 people may die from long term diseases related to the accident. However, other estimates range from 4,000 to 27,000 by the Union of Concerned Scientists or Greenpeace who estimate that between 93,000 - 200,000 people died as a result of the disaster.