US President Barack Obama looks on as Chinese President Xi Jinping speaks during a joint press conference in the Great Hall of the People in BeijingPhotograph: Greg Baker/AFP/Getty Images
Lenore Taylor, Guardian Australia political editor, Tania Branigan in Beijing and agencies-Wednesday 12 November 2014
The United States and China have unveiled a secretly negotiated deal to reduce their greenhouse gas output, with China agreeing to cap emissions for the first time and the US committing to deep reductions by 2025.