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Climate Chat

Climate Chat

By: Dan Miller and Leon Simons hosts
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Summary

 Climate Chat is a channel where we discuss all things climate with scientists, technologists, authors, advocates, communicators and others helping us understand and fight climate change.Copyright 2026 Climate Chat Earth Sciences Science
Episodes
  • New Global Emissions Projections: Scrapping the Highs & Lows with Detlef van Vuuren

    New Global Emissions Projections: Scrapping the Highs & Lows with Detlef van Vuuren
    May 8 2026
    In this Climate Chat episode, hosts Leon Simons and Dan Miller interview climate scientist Detlef van Vuuren about his recent paper where he lays our new "emissions scenarios" that will be used by the IPCC to predict future global warming. Since future temperatures depend on our future greenhouse gas emissions, scientists need to use emission scenarios to predict future temperatures. Past scenarios included what some scientists felt were beyond the possible worst case emissions, as well as scenarios that assumed much less emissions than currently seems feasible. Detlef and his colleagues has set forth a set of scenarios that fall in the middle of past approaches. Detlef van Vuuren is a senior researcher at PBL Netherlands Environmental Assessment Agency and a professor in Integrated Assessment of Global Environmental Change at the Faculty of Geosciences, Utrecht University. Leading the IMAGE integrated assessment modelling team, his research concentrates on using model-based scenarios to identify response strategies to global environmental problems. He is a member of several international scientific commissions, including the Integrated Assessment Modelling Consortium, the Global Carbon Project and the Earth Commission. Detlef van Vuuren had a coordinating role in developing the Representative Concentration Pathways and Shared Socio-economic Pathways now used in the IPCC’s assessments. He has participated as (coordinating) lead author in various assessments such as the Millennium Ecosystem Assessment, UNEP’s Global Environmental Outlook and various IPCC reports. Detlef van Vuuren has published more than 430 articles in refereed journals. Based on his work, Reuters listed him 2021 as the 4th most influential climate scientist worldwide. Detlef's article on the new CMIP7 emissions scenarios: https://gmd.copernicus.org/articles/19/2627/2026/ Please Like and Subscribe! Listen to Climate Chat on Apple Podcasts: https://podcasts.apple.com/us/podcast/climate-chat/id1893162516 Listen to Climate Chat on Spotify: https://open.spotify.com/show/1m0OSLWRPPcyOddErvxJ1e Dan Miller has been giving talks around the world on the need for urgent climate action for over 20 years. He is co-founder of The Roda Group, a climate-tech venture capital group, and he serves as an advisor for other climate funds and climate-focused non-profit groups. He started Climate Chat in 2021 on Clubhouse and added YouTube in 2023. Follow Dan Miller on X/Twitter: @danmiller999 Follow Dan Miller on Bluesky: @danmiller999.bsky.social and @climatechat.bsky.social Leon Simons is a climate scientist based in the Netherlands. He was a co-author with James Hansen on the 2023 "Global Warming in the Pipeline" paper that discussed the recent acceleration in global warming. Leon's work has focused recently on changes in aerosol emissions from ships and the impact of those changes on climate change. You can access Leon's research writings here: https://www.researchgate.net/profile/Leon-Simons Follow Leon on X/Twitter: @LeonSimons8 and Bluesky: ‪@leonsimons.bsky.social‬ Follow Leon on Patreon: https://www.patreon.com/c/LeonSimons/home Follow Stacey Randecker on X/Twitter: @DrivingMzStacey and Bluesky: @bikingmzstacey.bsky.social Follow Eli Rabani on X/Twitter: @radsci and Bluesky: @radsci.bsky.social You can leave a question in the YouTube Live chat. Please begin your question with "Question:" to make it easy for our mods to spot it. For more Climate Chat episodes, see our YouTube home page: https://www.youtube.com/@climatechat For recent YouTube Live Climate Chat programs: https://www.youtube.com/@climatechat/streams
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    1 hr and 26 mins
  • Biochar Carbon Removal: Finally Ready for Primetime? with Alan Ransil

    Biochar Carbon Removal: Finally Ready for Primetime? with Alan Ransil
    May 2 2026
    In this Climate Chat episode, host Dan Miller interview Devonian Systems co-founder and CEO Alan Ransil about their approach to producing biochar. Biochar is produced when biomass is burned without the presence of oxygen, a process know as pyrolysis. Wood treated this way is also known as charcoal. Biochar is a very stable form of carbon and, therefore, it is a way to sequester CO2 from the atmosphere. While biochar has been produced for thousands of years, it is yet to scale up to a major climate solution. Devonian systems hopes to change that. Dr. Alan Ransil is the co-founder and CEO of Devonian Systems. He studied energy storage materials at MIT where he received his PhD in 2018, and has worked on projects for the MIT Energy Initiative, ARPA-E, and DARPA. He started Filecoin Green, a sustainability initiative for the world’s largest decentralized storage network. He is an advisor to the Global Carbon Reward project, and for the Commons.Earth event series. Follow Alan on LinkedIn: linkedin.com/in/alan-ransil-53573873 Devonian Systems website: https://devonian.ai Follow Devonian Systems on Bluesky: @devoniansystems.bsky.social Please Like and Subscribe! Listen to Climate Chat on Apple Podcasts: https://podcasts.apple.com/us/podcast/climate-chat/id1893162516 Listen to Climate Chat on Spotify: https://open.spotify.com/show/1m0OSLWRPPcyOddErvxJ1e Dan Miller has been giving talks around the world on the need for urgent climate action for over 20 years. He is co-founder of The Roda Group, a climate-tech venture capital group, and he serves as an advisor for other climate funds and climate-focused non-profit groups. He started Climate Chat in 2021 on Clubhouse and added YouTube in 2023. Follow Dan Miller on X/Twitter: @danmiller999 Follow Dan Miller on Bluesky: @danmiller999.bsky.social and @climatechat.bsky.social Leon Simons is a climate scientist based in the Netherlands. He was a co-author with James Hansen on the 2023 "Global Warming in the Pipeline" paper that discussed the recent acceleration in global warming. Leon's work has focused recently on changes in aerosol emissions from ships and the impact of those changes on climate change. You can access Leon's research writings here: https://www.researchgate.net/profile/Leon-Simons Follow Leon on X/Twitter: @LeonSimons8 and Bluesky: ‪@leonsimons.bsky.social‬ Follow Leon on Patreon: https://www.patreon.com/c/LeonSimons/home Follow Stacey Randecker on X/Twitter: @DrivingMzStacey and Bluesky: @bikingmzstacey.bsky.social Follow Eli Rabani on X/Twitter: @radsci and Bluesky: @radsci.bsky.social You can leave a question in the YouTube Live chat. Please begin your question with "Question:" to make it easy for our mods to spot it. For more Climate Chat episodes, see our YouTube home page: https://www.youtube.com/@climatechat For recent YouTube Live Climate Chat programs: https://www.youtube.com/@climatechat/streams
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    1 hr and 28 mins
  • Climate Blind Spots: Why SF Climate Week Worried Me

    Climate Blind Spots: Why SF Climate Week Worried Me
    Apr 27 2026
    In this Climate Chat episode, host Dan Miller talks about what he learned at San Francisco Climate Week and what worried him about optimism bias and the lack of appreciation of accelerated warming and tipping points. He will also discuss some optimistic signs of awareness and solutions. Please Like and Subscribe! Listen to Climate Chat on Apple Podcasts: https://podcasts.apple.com/us/podcast/climate-chat/id1893162516 Listen to Climate Chat on Spotify: https://open.spotify.com/show/1m0OSLWRPPcyOddErvxJ1e Dan Miller has been giving talks around the world on the need for urgent climate action for over 20 years. He is co-founder of The Roda Group, a climate-tech venture capital group, and he serves as an advisor for other climate funds and climate-focused non-profit groups. He started Climate Chat in 2021 on Clubhouse and added YouTube in 2023. Follow Dan Miller on X/Twitter: @danmiller999 Follow Dan Miller on Bluesky: @danmiller999.bsky.social and @climatechat.bsky.social Leon Simons is a climate scientist based in the Netherlands. He was a co-author with James Hansen on the 2023 "Global Warming in the Pipeline" paper that discussed the recent acceleration in global warming. Leon's work has focused recently on changes in aerosol emissions from ships and the impact of those changes on climate change. You can access Leon's research writings here: https://www.researchgate.net/profile/Leon-Simons Follow Leon on X/Twitter: @LeonSimons8 and Bluesky: ‪@leonsimons.bsky.social‬ Follow Leon on Patreon: https://www.patreon.com/c/LeonSimons/home Follow Stacey Randecker on X/Twitter: @DrivingMzStacey and Bluesky: @bikingmzstacey.bsky.social Follow Eli Rabani on X/Twitter: @radsci and Bluesky: @radsci.bsky.social You can leave a question in the YouTube Live chat. Please begin your question with "Question:" to make it easy for our mods to spot it. For more Climate Chat episodes, see our YouTube home page: https://www.youtube.com/@climatechat For recent YouTube Live Climate Chat programs: https://www.youtube.com/@climatechat/streams
    Show More Show Less
    1 hr and 15 mins
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