Plan Sea: Ocean Interventions to Address Climate Change

Wil Burns and Anna Madlener

45 episodes listed below

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In their own words

Plan Sea is hosted by Wil Burns, Co-Director of the Institute for Responsible Carbon Removal at American University, and Anna Madlener, Senior Manager for monitoring, reporting, and verification (MRV) at the Carbon to Sea Initiative. As co-hosts, Wil and Anna invite guests to the podcast each episode to discuss potential ocean-based climate solutions, particularly approaches that lead to carbon dioxide removal (CDR) from the atmosphere. The podcast scrutinizes risks and benefits of these options, as well as matters of governance, community engagement, ethics, and politics.

Why you'd press play

Even a mixing zone has to answer questions here, if that's your kind of climate conversation.

Press play if you want

  • to know how an ocean trial measures carbon removal while checking water quality
  • to hear what happens when a community says no to a permitted project
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Talks about

Best episodes of Plan Sea: Ocean Interventions to Address Climate Change

Short reviews from the PlayNext desk, based on the episodes we processed.

Coastal Resilience and oCDR with Carbon Removal Standards Initiative’s Dr. Gabby Kitch and Anu KhanApr 2, 2026

A measured look at how coastal resilience projects could also support carbon removal.

Coastal resilience offers a practical way into carbon dioxide removal in this conversation with Dr. Gabby Kitsch and Anu Khan. Their roadmap looks at how projects along the U.S. coastline could strengthen communities while also expanding CDR potential.

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Episodes

  1. 1

    Romany Webb on Recommendations for Permitting Seaweed Cultivation in California

    ·29m
  2. 2

    Insights from the 2025 Ocean Visions Summit, Part One

    Host Anna Madliener and guest Danny Galowski discuss their experiences and conversations from the 2025 Ocean Visions Summit in Vancouver, focusing on ocean-based climate interventions.

    ·1h 7m
  3. 3

    Dr. Phil Renforth and Dr. Mijndert Van der Spek on a harmonized framework for techno-economic analyses and lifecycle assessments of OAE

    ·50m
  4. 4

    The U.S. Department of Energy’s Rory Jacobson on the evolving landscape of mCDR

    This episode features an interview with Rory Jacobson from the U.S.

    ·49m
  5. 5

    Professor Dr. Alexander Proelss on the current state of international legal frameworks regulating oCDR

    ·1h 6m
  6. 6

    Researchers Dr. Leila Kittu, Dr.Giulia Faucher, and Dr. Charly Moras discuss Ocean Alk-Align’s global research of OAE safety

    ·1h 1m
  7. 7

    Planetary Technologies’ Mike Kelland and Dr. Will Burt update on the company’s growth

    This episode features an update interview with Planetary Technologies' CEO Mike Kelland and chief ocean scientist Dr.

    ·51m
  8. 8

    Alex Gagnon on Banyu Carbon’s novel Direct Ocean Removal approach

    This episode features Alex Gagnon, co-founder and CEO of Banyu Carbon, discussing their novel direct ocean removal approach that uses sunlight to remove CO2 from seawater as a climate change solution.

    ·1h 14m
  9. 9

    Dr. Lydia Kapsenberg and Dr. Tyler Cyronak discuss research advancements on OAE’s environmental safety

    ·43m
  10. 10

    Jessica Cross on The Pathways for Ocean-Based Carbon Removal Approaches

    ·46m
  11. 11

    Steve Crooks and Elizabeth Guinessey on The Seascape Initiative

    ·36m
  12. 12

    Mowgli Holmes on How Carbon Sequestration will be Measured, Reported, and Verified (MRV) in the Future

    ·48m
  13. 13

    Captura’s CEO Steve Oldham discusses Direct Ocean Capture technology

    This episode features an interview with Captura CEO Steve Oldham about their direct ocean capture technology that uses electrochemistry to remove CO2 from seawater to address climate change.

    ·58m
  14. 14

    Dr. David Koweek of Ocean Visions on the Importance of Interdisciplinary Networks for Marine Carbon Dioxide Removal

    This episode features Dr.

    ·46m
  15. 15

    Dr. Grace Andrews on Hourglass Climate’s Approach to Monitoring Ocean Alkalinity Enhancement

    This episode features an interview with Dr.

    ·56m
  16. 16

    Exploring the OAE Best Practice Guide with Jean-Pierre Gattuso and Andreas Oschlies

    This episode discusses the creation of the Ocean Alkalinity Enhancement Best Practice Guide, led by Jean-Pierre Gattuso and Andreas Oschlies, covering its motivation, assembly of experts, and key topics in ocean-based carbon dioxide removal.

    ·1h 18m
  17. 17

    WHOI’s Dr. Adam Subhas and Jennie Rheuban on the LOC-NESS OAE Field Trial

    ·59m
  18. 18

    A Deep Dive on Principles for Responsible Ocean Carbon Removal Development & Governance

    ·51m
  19. 19

    Dr. Matt Eisaman and Frances Simpson-Allen on Ebb Carbon's Ocean Alkalinity Enhancement Approach and Developments

    This episode features Dr.

    ·49m
  20. 20

    Planeteers’ Frank Rattey and Dr. Thorben Amann on closed-system, alkalinity-based carbon removal

    ·1h 5m
  21. 21

    Special Episode by Plan Sea and The Carbon Curve: Insights from the Carbon to Sea 2025 Annual Convening with Dr. Lennart Bach

    This special joint podcast episode features hosts from Plan C and The Carbon Curve interviewing scientist Dr.

    ·34m
  22. 22

    Arin Crumley and Christian Robinson on Pull to Refresh, a Carbon Reversal Program

    ·52m
  23. 23

    A new season of Plan Sea

    This episode announces the second season of the Plan C podcast, now co-produced by the Carbon to Sea Initiative and American University's Institute for Responsible Carbon Removal, focusing on ocean-based climate interventions.

    ·5m
  24. 24

    CarbonPlan's Freya Chay on Market Shaping and Uncertainty in Marine Carbon Dioxide Removal

    This episode features an interview with Freya Chay about market shaping and uncertainty in marine carbon dioxide removal, with hosts discussing their backgrounds in ocean MRV and carbon removal research.

    ·53m
  25. 25

    Hourglass Climate's Dr. Grace Andrews and Kristi Weighman on the launch of the Framework for Ecotoxicological Modeling of mCDR

    ·1h 2m
  26. 26

    Stefano Capello and Sara Groppelli on Limenet’s approach to limestone-based OAE

    ·1h 3m
  27. 27

    Rose Sharifian of SeaO2 on Electrochemical Ocean Carbon Capture and the European Marine CDR Community

    This episode features an interview with Dr.

    ·40m
  28. 28

    Dr. Ken Buesseler on New Perspectives and Opportunities for Ocean Iron Fertilization

    This episode features Dr.

    ·54m
  29. 29

    Dr. Lennart Bach and Dr. Veronica Tamsitt on (Cost-)Efficiency of Iron Fertilization in the Southern Ocean

    This episode discusses the history, recent resurgence, and cost-efficiency of ocean iron fertilization as a marine carbon dioxide removal approach, focusing on research and policy implications.

    ·59m
  30. 30

    Submarine Scientific and Cascade Climate on Enhancing Carbon Removal Research Efficiency through Data Standardization and Sharing

    This episode discusses how data standardization and sharing initiatives, led by organizations like Cascade Climate and Submarine Scientific, are enhancing research efficiency in carbon removal methods such as ocean alkalinity enhancement and enhanced rock weathering.

    ·50m
  31. 31

    Matt Long on the [C]Worthy initiative for MRV modeling frameworks

    This episode of Plan Sea features Matt Long, a scientist at the National Center for Atmospheric Research, discussing his work on earth system models used by the IPCC and the Seaworthy Initiative for MRV in ocean-based carbon removal.

    ·46m·4 clips
  32. 32

    Philip Boyd on Operational monitoring for Detection, Attribution and Determination of Side Effects of Marine CDR

    Hosts discuss ocean-based carbon dioxide removal and interview a scientist about a new paper on MRV for ocean CDR.

    ·56m
  33. 33

    Isometric’s Dr.'s Sophie Gill, Jing He, and Jennifer Yin on Marine Carbon Removal Certification

    Hidden gem

    Plan Sea hosts Anna Madliener and Will Burns interview Isometric’s Sophie Jill, Jing He, and Jennifer Yin about certifying marine carbon removal credits.

    ·1h 15m·5 clips
  34. 34

    SEAO2_CDR: An Insight into the European Ocean CDR Space with Christopher Pearce, Patricia Grasse and Christine Merk

    Hidden gem

    Plan C examines the European Union-funded CO2 CDR project, which evaluates ocean-based carbon dioxide removal through technical, governance, and policy research.

    ·47m·3 clips
  35. 35

    Community Engagement and Trial Monitoring with Ebb Carbon’s Kyla Westphal and Dr. Mallory Ringham

    Hidden gem

    Plan C examines how Ebb Carbon secured the first NPDES permit for marine carbon dioxide removal at Project Macoma in Port Angeles, Washington.

    ·48m·3 clips
  36. 36

    Scientific Communication with COMPASS mCDR Communication Leaders at OSM 2026

    This episode, recorded at the Ocean Sciences Meeting, discusses science communication and features interviews with members of the MCDR communication leaders cohort.

    ·1h 1m
  37. 37

    Exploring the Risks and Riches of the Deep Sea Ecosystems in Climate Interventions: A Discussion with Lisa Levin

    This episode of Plan Sea features guest Lisa Levin discussing the risks of ocean-based climate interventions, particularly their impact on deep sea ecosystems.

    ·37m·3 clips
  38. 38

    Mike Kelland of Planetary Technologies on Ocean Alkalinity Enhancement Policy and Community Engagement

    This episode of Plan Sea features Mike Kelland, CEO of Planetary Technologies, discussing the startup's work in ocean alkalinity enhancement for carbon dioxide removal.

    ·1h 8m·5 clips
  39. 39

    Cultivating and Sinking Sargassum for CO2 Uptake with Seafields Solutions

    This episode introduces a new co-host and discusses ocean seaweed cultivation for carbon sequestration with representatives from Seafields.

    ·57m
  40. 40

    Dr. Sara Nawaz and Dr. Terre Satterfield on Just, Responsible and Socially Viable Carbon Removal

    Hidden gem

    Will Burns interviews Sara Nawaz and Terre Satterfield about their Environmental Science and Policy paper on public engagement for offshore direct air capture and storage.

    ·46m·3 clips
  41. 41

    Dr. Jaime Palter and Dr. Dariia Atamanchuk Share Insights from Cutting-Edge OAE Field Research

    This episode features interviews with two leading researchers, Dr.

    ·1h 1m
  42. 42

    Insights from the 2025 Ocean Visions Summit, Part Two

    This episode is part two of a series sharing insights from the 2025 Ocean Visions Summit, featuring interviews with experts discussing ocean-based climate interventions focused on reducing impacts, repairing damage, and reaching international policy goals.

    ·54m
  43. 43

    How current policies affect ocean-based carbon removal research and innovation in Canada

    This episode examines how Canada's policies and regulations impact ocean-based carbon removal research and innovation within its national waters.

    ·54m
  44. 44

    Coastal Resilience and oCDR with Carbon Removal Standards Initiative’s Dr. Gabby Kitch and Anu Khan

    Hidden gem

    Plan C hosts Will Burns and Anna Madlener interview Carbon Removal Standards Initiative executive director Anu Khan and marine CDR researcher Dr.

    Apr 2, 2026·56m·3 clips
  45. 45

    CALLOUT: We want to hear from you!

    The hosts invite listeners to share their thoughts on 2024 milestones and hopes for 2025 in marine carbon dioxide removal.

    Jan 10, 2025·1m