Low-risk levels of plutonium have been found in the soil at the Fukushima power plant in Japan. Experts believe that the source may be from fuel rods or from damage from one of the reactors. Plutonium is a by-product of atomic reactions also used in nuclear bombs.
The Tokyo Electric Power Company (TEPCO) says that the plutonium is not at the level that’s harmful to human health. Despite this reassurance, Japan’s nuclear safety agency was not optimistic, calling the situation worrisome.