US Special Presidential Envoy for Climate John Kerry arrives on stage to deliver a speech during COP26. Photo: BRENDAN SMIALOWSKI/AFP via Getty Images/NTB scanpix

'Cooperation the only way': US and China surprise COP26 with joint climate action pledge

Superpowers attempt to reset testy relationship with declaration of intent covering action on methane and CO2 emissions

11 November 2021 10:06 GMT Updated  11 November 2021 10:06 GMT