OSLO (Reuters) – International experts have not been able to find what caused a cloud of radioactive pollution that spread over Europe last year
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Monitoring stations recorded high levels of a radioactive isotope in the air over most European cities at the beginning of October.
Scientists from France said soon afterwards they thought the source was an accident at a nuclear facility in Russia or Kazakhstan – a suggestion dismissed by both countries.
Read more at Experts fail to find origin of nuclear pollution cloud over Europe
