Guest Speakers – Healthy Planet Action Coalition

Sev Clarke – Ocean Nanobubbles and Buoyant Flakes, September 5, 2025

By HPACAdminpresentation

Sev Clarke discusses the climate cooling potential of ocean nanobubbles and buoyant flakes. Sev is an independent Australian inventor of climate solutions and industrial process efficiencies. He has a double degree in Chemistry, History & Economics from Melbourne University, followed ten years later with a Stanford MBA. He...

September 5, 2025

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Jules Pretty – Story Telling for Climate Change Part II, July 25, 2025

By HPACAdminpresentation

Professor Jules Pretty, an author and scientist, HPAC member and Emeritus This masterclass part II (see July 10, 2025 recording for part I) is being led by Professor Jules Pretty, an author and scientist, HPAC member and Emeritus Professor of Environment and Society at the University of Essex....

July 25, 2025

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Jules Pretty – Story Telling for Climate Change Part I, July 10, 2025

By HPACAdminpresentation

Professor Jules Pretty, an author and scientist, HPAC member and Emeritus This masterclass part I is being led by Professor Jules Pretty, an author and scientist, HPAC member and Emeritus Professor of Environment and Society at the University of Essex. He writes about nature, climate and people, creating...

July 10, 2025

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A Conversation with Rafe Pomerance

By HPACAdminpresentation

Recording: A Conversation with Rafe Pomerance December 16, 2021 References: Sustaining the Arctic in Order to Sustain the Global Climate System, Bodansky & Pomerance, September 2021 The Arctic is Warming Four Times Faster than the Rest of the World, Paul Voshen; Science, December 14, 2021 US Arctic Report Card Is Incomplete, Zaelke,...

June 29, 2025

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David Spratt Accelerated Climate Change and the Case for Cooling, June 26, 2025

By HPACAdminpresentation

David Spratt is Research Director for the Breakthrough National Centre for Climate Restoration in Melbourne Australia. He is co-author of Climate Code Red: The case for emergency action which almost 20 years ago proposed emergency-scale mobilization as a necessary response to climate disruption. His work has focused on...

June 26, 2025

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Jeffrey Nielsen – SAI as a Security Dilemma Between the United States and China, June 12, 2025

By HPACAdminpresentation

Major Jeffrey Nielsen is a trained national security strategist with military experience in North America, Europe, West Asia, and East Asia. He researched international climate change security at the US Army's Command and General Staff College before publishing in Oxford Open Climate Change. He will be presenting his...

June 12, 2025

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Greg Rau, The State of Marine Carbon Removals: Ocean Alkalinity Enhancement, HPAC, May 1, 2025

By HPACAdminpresentation

Dr. Greg Rau is a pioneer in applied carbon cycle research, with over 40 years of experience. He is currently Chief Technology Officer and Co-Founder at Planetary Technologies, where he leads the development and scaling of ocean alkalinity enhancement (OAE) as a climate solution. Dr. Rau is also...

May 1, 2025

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David Spratt – Climate Code Red: The Case for Emergency Action, April 20, 2023

By HPACAdminpresentation

David Spratt is an author, Australian climate policy analyst and advocate, and Research Director at the Breakthrough National Centre for Climate Restoration.

April 20, 2025

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Taylor, MacCracken and Simmens – HPAC Townhall, Recent Publications of HPAC Interest, April 17, 2025

By HPACAdminpresentation

Graeme Taylor is a long time active HPAC member and lead author of "A Realistic Climate Strategy" Taylor et al. 2025: https://eartharxiv.org/repository/vie... Michael MacCracken is a retired senior climate scientist and an HPAC Steering Circle Member. Herb Simmens is author of "A Climate Vocabulary of the Future" and...

April 17, 2025

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Mark Jacobson – Solutions for Transitioning to Clean Renewable Energy, April 3, 2025

By HPACAdminpresentation

Conversations with Mark Jacobson: Solutions for Transitioning to Clean Renewable Energy, and Mike MacCracken and Herb Simmens: The Rationale for HPAC Support of Aggressive Mitigation. Mark Jacobson is a Professor of Civil and Environmental Engineering at Stanford University. Mike MacCracken is a retired senior US climate research scientist...

April 3, 2025

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Bruce Parker -The Scenario Explorer, March 20, 2025

By HPACAdminpresentation

Discussion with Bruce Parker, Data Systems Analyst and HPAC member, regarding his "Scenario Explorer", a climate modeling simulator.

March 20, 2025

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The Belem Accord – A Global Pledge by Heads of State to Adopt a New Climate Goal, February 20, 2025

By HPACAdminpresentation

A conversation about The Belem Accord: A Global Pledge by Heads of State to Adopt a New Climate Goal and Plan to Restore a Safe and Healthy Climate for Humanity. Topic of Feb. 20, 2025 HPAC General Meeting.

February 20, 2025

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GUEST

SPEAKERS

(See a simple list here)

Sev Clarke – Ocean Nanobubbles and Buoyant Flakes, September 5, 2025

Jules Pretty – Story Telling for Climate Change Part II, July 25, 2025

Jules Pretty – Story Telling for Climate Change Part I, July 10, 2025

A Conversation with Rafe Pomerance

David Spratt Accelerated Climate Change and the Case for Cooling, June 26, 2025

Jeffrey Nielsen – SAI as a Security Dilemma Between the United States and China, June 12, 2025

Greg Rau, The State of Marine Carbon Removals: Ocean Alkalinity Enhancement, HPAC, May 1, 2025

David Spratt – Climate Code Red: The Case for Emergency Action, April 20, 2023

Taylor, MacCracken and Simmens – HPAC Townhall, Recent Publications of HPAC Interest, April 17, 2025

Mark Jacobson – Solutions for Transitioning to Clean Renewable Energy, April 3, 2025

Bruce Parker -The Scenario Explorer, March 20, 2025

The Belem Accord – A Global Pledge by Heads of State to Adopt a New Climate Goal, February 20, 2025

Healthy Planet Action Coalition