The deal moved away from the firewall between developed and developing countries; going backward would undermine ambition
Todd Stern and Xie Zhenhua were opposing climate envoys for nearly five years – but in the heat of international negotiations they forged a vital friendship
NEWS: Leading architect of 2015 Paris deal will be replaced by veteran US diplomat and energy expert Jonathan Pershing
PROFILE: Stung into action by a student protester, Todd Stern has forged climate consensus with China with a hostile Congress at his back
NEWS: Todd Stern tells Capitol Hill committee new UN climate deal will be crafted under existing treaties, bypassing requirements for lawmaker approval
NEWS: Chief US negotiator says December 2015 summit will be first step in series of deals up to and beyond 2020
NEWS: US climate envoy said that more ambitious Copenhagen pledge had been contingent upon failed legislation
NEWS: US Secretary of State says this week’s climate talks have been productive, but warns of further challenges
NEWS: Chinese and US lead negotiators Xie Zhenhua and Todd Stern says talks on climate treaty are progressing well
Early submission to UN reveals White House support for flexible deal involving developed and developing nations
Next three years are crucial in determining the shape of climate action, say policy experts at two day Chatham House conference
Lead climate envoy Todd Stern tells audience in London too much focus on ‘legal form’ could blow hopes of agreement
John Kerry says climate will dominate this week’s US-China talks, as cooperation on carbon capture and energy efficiency announced
Developing nations say State Department hosted summit on April 10-11 needs to provide pathway for key funds to be delivered
Lead US negotiator Todd Stern calls for a flexible deal that distributes responsibility in a way that represents the modern world
Climate Live: The latest climate change headlines curated by RTCC, updated daily from 0830-1700 GMT
Despite promises in election victory speech, there were few signs of newfound urgency on climate change from US delegation at Doha COP18 summit
Complementary measures welcome but talking down UNFCCC is “unhelpful” ahead of Doha talks, say observers.
US climate envoy was heavily criticised for suggesting 2C target should be flexible – but maybe flexibility on all sides of UNFCCC negotiations could help move process forward.
USA climate chief Todd Stern says his comments over the UNFCCC’s 2 degrees target have been misunderstood