Beijing looks for 10-year pledge on climate policy

A new global climate agreement to be signed next year in Paris should cover all key elements and be effective for 10 years, the deputy head of China's delegation at the United Nations climate talks in Lima, Peru, said on Thursday.

Su Wei, the country's chief climate negotiator, said China has an open mind on the final term for referring to the Paris agreement: It will be either be a "protocol" or some other form that carries legal force, he said.

"First we need to determine the substance, and then let the substance determine the form," Su said.