"U.S. Secretary of State John Kerry made an impassioned plea [Dec. 11] for all nations to work for an ambitious U.N. deal next year to fight climate change, saying time was running out to reverse a course 'leading to tragedy'.

He also took aim at domestic critics of President Barack Obama who question whether climate change is mainly man-made, saying that scientific findings were overwhelming and 'screaming at us, warning us'.

'Every nation, every nation has a responsibility to do its part,' he said in a speech at United Nations talks in Lima that are trying to sketch out elements of a draft 190-nation deal due in Paris in late 2015 to curb rising world greenhouse gas emissions."

Patricia Zengerle and Valerie Volcovici report for Reuters December 11, 2014. [2]

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Text of Kerry Remarks [3]

Video of Kerry Remarks [4]