Will technology and innovation slow down or even reverse climate change? Amol Rajan looks at some of the existing innovations that could help reduce greenhouse gas emissions, and also at some of those still being developed. He asks whether we're relying too much on the promise of technology that either isn’t ready yet or can’t work at scale.

Graihagh Jackson, presenter of the BBC podcast ‘The Climate Question’ is with Amol alongside guests the former President of Kiribati Anote Tong, James Arbib, Aoife O’Leary and Dr Jan Rosenow.

Producers Nick Holland and Marianna Brain Sound design Graham Puddifoot Editor Lizzi Watson Production coordinators Siobhan Reed, Helena Warwick-Cross and Sophie Hill