MAIL ONLINE: How workers who buried radioactive waste from 43 US nuclear explosions hid a MIDDLE FINGER salute statue inside radioactive dome on Pacific island as warning for future visitors

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Professor Francis Livens of the University of Manchester's Dalton Nuclear Institute said that a number of factors, such as the radiation being dispersed, could mean the hazard is low.

'But if radioactivity is efficiently released and transported into food or water, or gives rise to exposure by some other means, then the hazard is relatively high,' he continued.