By far, the biggest danger from the disaster at Japan's Fukushima Daiichi power plant is to the workers who are trying to control a still-volatile situation. But with the crisis likely to play out for months, people are beginning to wonder what the release of radioactive material actually means.
Very low levels of radioactive material have been found in the water supply in Tokyo, for example, and those same particles are being carried by the wind elsewhere in the world.
Workers at the plant are being exposed to radiation coming directly from the core and spent-fuel cooling pools. For … Read more