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Nan Ransohoff, head of climate at Stripe, discusses Frontier, the advanced market commitment that has contracted nearly $700 million for durable carbon removal, with portfolio companies building toward 1.4 million tons of annual capacity. She explains why the field is in a wartime mobilization state: the 2018 IPCC report established the need for a teraton of removal over 100–150 years, yet she spent three weeks talking to everyone in the space and found no one owning the problem. The episode covers enhanced weathering as an underexplored pathway (a teraton for under $80/ton), the moral hazard debate, and how AI both threatens and helps the effort.
Reid Hoffman and Ransohoff then argue that the world's most important problems are "orphaned" and need general managers who define outcomes and pull whatever levers the moment requires. Ransohoff describes a new philanthropy wave from AI companies—estimating $37 to $100 billion per year from Anthropic and OpenAI foundations—and argues the bottleneck is organizational capacity, not capital: thousands of new organizations and a "PM to GM pipeline" for public goods. She proposes using Anthropic or OpenAI equity as compensation to attract top talent.
The episode is worth listening to for its concrete market-design framework (AMCs borrowed from vaccine economics), the specific numbers that make the scale legible, and the argument that corporate philanthropy's risk aversion is leaving outsized returns on the table.
Three Weeks of Orphaned Panicstory
Ransohoff was in North Carolina helping her father through a bone marrow transplant when she reread the 2018 IPCC report. She then spent three weeks talking to everyone in carbon removal and found no one who owned the problem, which is when she decided to work on it full time.
Mount Everest Scaled to Hondurasdata
Ransohoff illustrates the scale of enhanced weathering by noting that all of Mount Everest (about three teratons of earth) turned into 50-meter-tall piles the size of Honduras could deliver all the carbon removal needed. She calls it "largely doable" and notes the technology is not very technology-forward.
Moral Hazard Is Not Yet Realdebate
Ransohoff addresses the concern that carbon removal creates a moral hazard where companies emit more knowing they can capture later. She argues the science requires doing both reduction and removal simultaneously, and that removal is not cheap enough for the hazard to be a real problem yet.
Voluntary Commitments Cannot Fund Thisstrategy
Ransohoff argues that at hundreds of billions per year, carbon removal cannot be funded by voluntary corporate commitments. Governments must step in as market makers through procurement, carbon taxes, or other policy mechanisms, and the baton pass from voluntary to policy-driven demand is the key question.
AMC Borrowed From Vaccine Economicsstrategy
Ransohoff explains that the advanced market commitment was invented for the pneumococcal vaccine in the mid-2000s by a group of economists funded by Gates. It guarantees future demand to fix demand uncertainty and works best when you don't know who the best inventor is, making it tech-agnostic.
Respiratory Infections as Orphaned Probleminsight
Ransohoff describes being "nerd-sniped" by respiratory infections: most healthy people get sick 2–4 times a year, we spend 5% of our lives sick with them, and they cost $500 billion to $1 trillion annually in lost productivity. She hosted a symposium of 40 scientists and launched a new Frontier-shaped initiative.
$50 Billion a Year, No Capacitydata
Ransohoff calculates that $50 billion per year from the new AI philanthropy wave would fund 333 ARC institutes or 5,000 Institute for Progresses annually, but the real problem is that there is no organizational capacity to absorb that money. She calls it a "wartime mobilization effort" to build the pipeline.
Equity as Philanthropy Compensationinsight
Ransohoff proposes using Anthropic or OpenAI equity as compensation for people working in philanthropy, calling it "uniquely tractable" because the money is sitting in equity at the most coveted companies in the world. She acknowledges it is a naive take but wants to chase it down.
Carbon removal has gone from a niche climate concept to one of the world's most important challenges. Reid and Aria sit down with Nan Ransohoff, Head of Public Goods at Stripe and a leader behind Frontier, the advanced market commitment helping build the market place for carbon removal. Nan explains why cutting emissions alone won't be enough to meet climate goals, what it will take to scale carbon removal from thousands to trillions of tons, and why governments—not just companies—will ultimately need to create and fund the markets that make it possible. They discuss the most promising carbon removal technologies, the role AI could play in accelerating climate solutions, and what it means to be a "general manager" for challenges that affect all of humanity. For more info on the podcast and transcripts of all the episodes, visit https://www.possible.fm/podcast/
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