Nature World: In an attempt to stop contaminated water from leaking out of the Fukushima Dai-ichi nuclear plant and entering the flow of groundwater that empties into the ocean, Japanese government announced Tuesday a plan to build a costly "ice wall" around the crippled nuclear plant.
At at cost of 32 billion yen (about $320 million) the underground ice wall will theoretically prevent contaminated groundwater from flowing out to sea by freezing the soil. Freezing the ground as a method of pollution control...