"Everything is radioactive all the time, but nobody was paying any attention to it," he said, referring to the low natural background levels of radiation present everywhere. "Most of us have no point of reference for what radiation is."
Online: Safecast: http://blog.safecast.org/
Follow Yuri Kageyama on Twitter at http://twitter.com/yurikageyama
Copyright 2012 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.