China's senior climate negotiator says his scientists are divided over when their carbon emissions will peak.
Reports earlier this week suggested that China would introduce an overall emissions cap by 2020.
Speaking on the fringes of UN climate talks in Bonn, Xie Zhenhua said that his country was determined to peak "as soon as possible".
See full Article: http://www.bbc.com/news/science-environment-27538716
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