japanRadioactivity from Japan’s crippled nuclear reactors has turned up off the British Columbia coast and the level will likely peak in waters off North America in the next year or two, according to a Canadian-led team that’s intercepted the nuclear plume. The radioactivity “does not represent a threat to human health or the environment,” but is detectable off Canada’s west coast and the level is climbing, a team led by oceanographer John Smith at Fisheries and Ocean Canada (also known as the Department of Fisheries and Oceans) reported Monday in the Proceedings of the National Academy of Sciences. More