The hands of the Doomsday Clock stay fixed at 100 seconds to midnight on the day that Joe Biden is one year in office. What were his climate ambitions, and has he been successful? The Tonga volcano brought our debate to geo-engineering, and Alister Doyle and I spoke about a lot more, like the role for youth in solving global challenges. Listen to the podcast, and join is next week, same day, same time: Thursday at 3 pm ET.

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