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Sep8-11, 07:46 AM
PF Gold
P: 1,220
Quote Quote by zapperzero View Post
Some of it is simply airborne contamination that fell to the water surface, no?
Yes, the NHK seems to view it that way too :

The researchers say the estimated amount of radioactivity includes a large amount that was first released into the air but entered the sea after coming down in the rain.