International protocol related to climate (5)

I believe the answer is:

kyoto

(Other definitions for kyoto that I've seen before include "Japanese city of treaty on climate change" , "Japanese capital before 1868" , "Tokyo (anag) - former capital of Japan" , "City of agreement on global warming" , "Former Japanese capital city - Tokyo (anag)" .)

I've seen this clue in the Sydney Morning Herald.

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