As the COP26 climate conference begins in Glasgow, much is at stake. Will the leaders gathered there be able to reach an agreement to slow global warming?US climate envoy John Kerry tells us why he is optimistic. We report from Australia, one of the rich countries lagging in its climate commitments, to look at the politics behind the negotiations.Hosted by Vijay Vaitheeswaran, The Economist’s global energy and climate innovation editor, with environment editor Catherine Brahic, and Oliver Morton, our briefings editor. For full access to print, digital and audio editions as well as exclusive live events, subscribe to The Economist at economist.com/climatepod and you can sign up to our fortnightly climate newsletter at economist.com/theclimateissue. See acast.com/privacy for privacy and opt-out information.