The deserted exclusion zone, near the Fukushima power plant, in Japan.
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Has Fukushima's radiation threat been exaggerated?

10 March 2016 Last updated at 00:04 GMT

Five years after the devastating earthquake, tsunami and subsequent nuclear meltdown at the Fukushima power plant in north-eastern Japan, one expert is asking if the impact of the radiation was massively exaggerated.

Professor Gerry Thomas, a leading authority on the effects of radiation, walks the BBC's Rupert Wingfield-Hayes through the deserted exclusion zone and measures radiation levels.