Japan has decided to treat and dump vast quantities of wastewater from its ruined Daiichi nuclear power plant into the ocean, in what it claims is the "best" solution for dealing with the contaminated leftovers from the Fukushima disaster.
The radioactive water amounts to over 1.25 million tonnes, or enough to fill 500 Olympic-sized swimming pools.
It's been sitting in 1,000 storage tanks since 2011, when an earthquake and a tsunami in Fukushima shattered the Daichi power plant and triggered a triple meltdown.
The Japanese government announced the decision to clean and dump the water on Tuesday, sparking outrage from environmentalists, fisheries and foreign governments that are uneasy with the notion.
"On the premise of strict compliance with regulatory standards that have been established, we select oceanic release," the government said in a news release.
Japan plans to spend several years treating and filtering the water before slowly releasing it into the Pacific Ocean over many decades.
The process is expected to start in two years.
Tepco and the Japanese government said they should be able to remove enough radionuclides from the water to get it down to acceptable levels, although it will never be fully clean.
They also won't be able to remove small amounts of tritium from the water, although they say those amounts are small enough not to be harmful.