Japan started releasing treated radioactive water from the wrecked Fukushima nuclear power plant into the Pacific Ocean yesterday afternoon, to the dismay of local fishing communities.
The move drew fresh and fierce criticism from China as being "selfish and irresponsible".
The discharge is a key step in a dauntingly long and difficult process of decommissioning the Fukushima Daiichi plant, including the removal of molten fuel after it was destroyed by a tsunami.
Our correspondent in Tokyo, Chris Gilbert, told producer Michael Cropp that plant operator Tokyo Electric Power, or Tepco, has 10 million tonnes of tritium contaminated water to get rid of.
