Japan’s radiation contamination spread across Northern Hemisphere.

Vienna - Japan’s crippled Daiichi nuclear facility near Fukushima, hit hard by the March 11 earthquake and tsunami, has released radioactive materials that have traveled across the entire Northern Hemisphere, a nuclear monitoring watchdog has reported.

The Preparatory Commission for the Comprehensive Nuclear-Test Treaty Organization (CTBTO) reported on Thursday that within nine days after the accident, the radioactive cloud had crossed North America, an

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