Around a million tonnes of radioactive water has built up in tanks at Fukushima 

Japan's Agency for Natural Resources and Energy wants to release it into the sea

The plant uses a filtration system to remove almost all contamination from water

A Japanese government agency has proposed releasing radioactive water from the stricken Fukushima nuclear plant into the environment, as storage space runs out.

The plant suffered a meltdown about nine years ago after it was hit by an earthquake-triggered tsunami. About a million tonnes of contaminated water has built up since then and the tanks that hold it are almost full.

The government's Agency for Natural Resources and Energy on Monday proposed three ways to deal with the water - releasing it into the sea, into the air using vaporisation or a combination of the two.