15 things you didn't know about Chernobyl

In the early morning of April 26th, 1986, reactor four of the Chernobyl nuclear station exploded. It caused what the United Nations has called 'the greatest environmental catastrophe in the history of humanity.'Chernobyl was the accident that the nuclear industry said would never happen.Twenty-five years later the Fukushima nuclear accident in Japan reminded us that the risk of another Chernobyl remains wherever nuclear power is used.
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