Nuclear waste buried under the ice of Greenland in a Cold War-era bunker is at risk of being exposed due to global warming, scientists have warned.
Radioactive coolant, sewage and diesel fuel, and tons of PCBs - a chemical coolant banned in 1979 - were abandoned at the US Camp Century base when it was decommissioned in 1967. The Americans left the base, which was used as a nuclear missile testing site, under the assumption that snowfall would it cover it up. When the site was mothballed, nuclear waste was buried in tunnels 50ft underground.
A study in Geophysical Research Letters, a journal of the American Geophysical Union, found the ice is melting faster than snow is falling to replenish it. It warned that the material could be released into the oceans by the end of the century.