Donald Trump's return to the White House poses serious challenges to climate change action and governance, but even before his second term began not nearly enough was being done to meet the goals of the Paris Agreement. In a series of conversations, Anna and Ruth interview thought leaders in the climate world about what the future of climate diplomacy should look like.

Their first guest in this new mini-series is Simon Sharpe (Managing Director of S-Curve Economics and author of 'Five Times Faster: Rethinking the Science, Economics and Diplomacy of Climate Change', with a previous career working on climate change issues within the UK Government).