This dome in the Pacific houses tons of radioactive waste – and it's leaking

The Runit Dome in the Marshall Islands is a hulking legacy of years of US nuclear testing. Now locals and scientists are warning that rising sea levels caused by climate change could cause 111,000 cubic yards of debris to spill into the ocean

http://www.theguardian.com/world/2015/jul/03/runit-dome-pacific-radioactive-waste