Russia's nuclear industry has a past shrouded in Soviet secrecy.
In the last 60 years, tens of thousands of people have reportedly been forced from their homes after radioactive waste was dumped into the Techa river in southwestern Siberia.
The government recently announced that the resettlement programme was over, yet four villages remain in the deadly radiation zone.
Al Jazeera's Charles Stratford travelled to the Chelyabinsk region, where radiation levels are 50 times higher than deemed safe for humans.
Click here to read Stratford's blog about his visit to the villages near the Mayak nuclear plant.
Source: Al Jazeera