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Tokyo's incredible underground flood defence systems

Tokyo's incredible underground flood defence systems

(12:40) Fifty metres beneath Tokyo is an amazing underworld river system which forms part of the city's flood management infrastructure.

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Maxwell1956 Maxwell1956 (27 days ago)
Latest comment:

or.....an undround submarine base which is perfectly legal and moral.

Original comment
Latest comment:

or.....an undround submarine base which is perfectly legal and moral.

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