Last December, a month before his inauguration, Biden announced he was naming former secretary of state John Kerry as the first ever presidential envoy for climate as part of his plan to deal with the crisis. Joan E Greve talks to Oliver Milman about what Biden’s climate change plans are, what challenges he’s up against and if he and John Kerry can lead the way in solving the climate crisis.. Help support our independent journalism at theguardian.com/politicspod