The G7 group of the richest nations, at its summit in the UK on 13 June undertook to focus on various other technologies, including carbon capture, to help speed up the transition away from coal.

The Group of Seven nations has pledged to rapidly scale up technologies and policies that accelerate the transition away from unabated coal capacity, including ending new government support for coal power by the end of this year.

In a communique following the summit in Britain, they confirmed pledges to increase climate finance contributions as part of efforts to reduce emissions that contribute to climate change and help a move toward cleaner energy – although climate groups have pointed out that firm cash promises and other details were missing.

"Coal power generation is the single biggest cause of greenhouse gas emissions," said representatives of the seven nations – the United States, Britain, Canada, France, Germany, Italy and Japan – adding that continued global investment in unabated coal power generation is incompatible with keeping 1.5°C within reach.

US president Joe Biden, speaking after the summit, noted a commitment of up to $2 billion "to support developing countries as they transition away from unabated coal-fired power."