Japanese officials managed to restore electricity to three damaged reactors at Fukushima Daiichi by March 28 but were battling to keep the unit’s radioactive water from leaking into the sea. Tokyo Electric Power Corp. (TEPCO) reported that water in concrete tunnels beneath Unit 2 was emitting radiation levels of 1,000 millisieverts per hour, or about 100,000 times the reactor’s normal level. The Japanese government also reported that it had detected the presence of plutonium in the soil around the reactors, a possible indication that a partial meltdown could have occurred at one of the three units. “The crisis at the
The 2016 Summer Olympics boating and swimming events have put an international spotlight on what has been a long-running problem in Rio de Janeiro—untreated sewage and trash are clogging up major bays and waterways.