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Editorial

Nature 438, 396 (24 November 2005) | doi:10.1038/438396a; Published online 23 November 2005

The heat is on

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A successor to the Kyoto Protocol on climate change must involve mandatory emissions caps.

Talks about a climate accord to succeed the Kyoto Protocol when it expires in 2012 begin in earnest next week in Montreal. They will take place amid concerns that nations who backed the protocol are retreating from its central principle: the imposition of mandatory caps on greenhouse-gas emissions.