Over a million North Koreans could be drinking water contaminated by underground nuclear weapons tests, study says

• Over a million North Koreans may be drinking water contaminated by nuclear material, a report says.
• The groundwater was likely contaminated by underground nuclear weapons testing.
• The report also warned of the danger posed by produce sent from North Korea to Japan and China. 

Groundwater from an underground North Korean nuclear weapons test site is spreading dangerous radioactive material to hundreds of thousands living in the country and abroad, a new report warns.