Blue and Green: The operator of the troubled Fukushima nuclear power plant, Tokyo Electric Power Company (Tepco), has begun construction of a 1.5km (0.9-mile) ice wall to contain leaked radioactive water. Some 1,550 coolant-circulating pipes will be inserted 25 metres into the ground in an attempt to freeze the soil surrounding the contaminated water. A Tepco official said, We plan to end all the construction work in March 2015 before starting trial operations. The state-funded ice wall could be in operation...