BBC: Negotiators worked through the night here in Yokohama in an effort to complete their review of a key report on the impacts of climate change.
At stake is a dense 29-page summary detailing the effects of climate change on the planet over the next 100 years.
Several hundred members of the UN's climate panel have been deep in deliberations since Tuesday, with many sessions running very late.
The report is the first such assessment since 2007.
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