The Economics of Carbon Removal with Nan Ransohoff

Episode Summary

Executive Summary: The episode explains why carbon removal is needed alongside emissions cuts, and how Stripe’s Frontier program uses a $925M advanced market commitment to create demand for an early, fragmented market. Nan Ransahoff outlines the carbon equation, distinctions between offsets and permanent removal, Frontier’s vetting and procurement model, policy gaps, MRV challenges, and what success looks like by 2030.

Main Topics: The carbon equation and net-zero framework (Priority: 5/5): The conversation frames climate as a supply-demand problem: reduce emissions first, then remove residual CO2 to reach net zero by 2050. Offsets vs. permanent carbon removal (Priority: 5/5): Nan distinguishes loosely defined offsets from Frontier’s focus on durable removal of CO2 from air/ocean and storage for at least 1,000 years. Frontier as an advanced market commitment (Priority: 5/5): Frontier is described as a $925M customer-funded AMC designed to create early demand, attract founders and investors, and push carbon removal down the cost curve. Policy, IRA, and market design (Priority: 4/5): The IRA improved some carbon-removal incentives, but policy still tends to favor a narrow set of technologies; broader, technology-agnostic support is needed. Carbon removal technologies and portfolio approach (Priority: 4/5): The episode surveys DAC, biomass pyrolysis, kelp sinking, enhanced rock weathering, synthetic biology, and geochemical approaches, emphasizing that no single winner is known yet. Measurement, reporting, and verification (MRV) (Priority: 4/5): The team discusses the difficulty of verifying tons across diverse approaches and the need for probabilistic, protocol-based MRV without stifling innovation. What success looks like by 2030 (Priority: 4/5): Success is not maximized tonnage today, but building demand, learning which pathways work, and ensuring a diverse portfolio capable of scaling.

Key Arguments: Climate change requires both emissions reduction and permanent removals; net zero means balancing residual emissions with removals. The world emits about 50 billion tons of CO2e annually, so even aggressive decarbonization will still leave hard-to-abate residual emissions. Carbon offsets are too broad and often low-quality; Frontier focuses specifically on permanent removal stored for 1,000 years or more. A natural market for carbon removal does not exist because CO2 removal has no intrinsic use, so early demand must be intentionally created. Frontier acts as a customer, not an equity investor, using its commitment to buy tons rather than shares. Voluntary and philanthropic demand alone cannot scale to the trillions implied by future CDR needs; policy will eventually be necessary. The IRA is helpful, but current tax-credit design still implicitly picks winners and excludes many promising pathways. Because carbon removal is a new industry, vetting must evaluate science, execution ability, and portfolio fit rather than standard SaaS metrics. Frontier uses pre-purchases for early-stage ideas and offtake agreements for more mature companies, matching risk to company stage. MRV must be robust but flexible, shifting from binary “did it happen or not” thinking to probabilistic confidence across different technologies. A diversified portfolio is essential because different carbon removal pathways have different cost curves, scalability limits, and permanence tradeoffs. Success by 2030 means demand is no longer a bottleneck, a portfolio of viable companies exists, and the field has learned which pathways deserve scale. Advanced market commitments can be a powerful climate tool beyond carbon removal, including SAF, hydrogen, and green steel.

Data Points: Atmospheric CO2 concentration (2021): ~416 ppm - Current level of atmospheric carbon dioxide cited in the carbon equation discussion. Atmospheric CO2 concentration (circa 1900): ~290 ppm - Historical comparison used to show the rise in atmospheric CO2. Increase in atmospheric CO2 over 120 years: 43% - Difference between ~290 ppm and ~416 ppm. Current annual global emissions: ~50 billion tons CO2e/year - Used as the baseline for the net-zero framework. Target year for net zero: 2050 - The year by which emissions must net to zero under the framework discussed. Residual emissions example for 2050: 5 billion tons emitted / 5 billion tons removed - Illustrates the “net” in net zero. Estimated CDR needed by 2050: ~6 billion tons/year - IPCC-based estimate for carbon dioxide removal scale required. Frontier commitment size: $925 million - Advanced market commitment to buy carbon removal over nine years. Frontier timeframe: 9 years - Duration over which the $925M commitment is deployed. Prior cumulative spend on permanent CDR: ~$30 million - Compared with Frontier to show how early the market is. Frontier purchase price range: $75/ton to $2,000/ton - Range of prices Frontier has paid for tons via Stripe Climate and Frontier. Weighted average purchase range: ~$700/ton to $3,000/ton - Approximate weighted average price mentioned for purchased tons. Desired future price target: < $100/ton - Common directional target for making carbon removal scalable. Pre-application count in latest RFP: 120 - Sign of growing field interest in Frontier’s fall RFP. Change in pre-applications vs. spring cycle: ~2x increase - Nan said the fall cycle saw about double the pre-applications compared with six months earlier. Pre-purchase check size: $500,000 - Early-stage funding Frontier provides before tons are delivered.

Pivotal Quotes: "This field is so early, we don't want to pick a horse yet" — Nan Ransahoff: Describing why Frontier uses technology-agnostic criteria rather than backing one pathway too early. "We are the customer for carbon removal companies. We are not making an equity investment in them. We are putting money in and we are getting tons out." — Nan Ransahoff: Clarifying Frontier’s role as a buyer of carbon removal, not an investor in company ownership. "We want demand to no longer be a growth bottleneck for great carbon removal companies." — Nan Ransahoff: Defining one of Frontier’s core success metrics by 2030.

Implications: Carbon removal is moving from theory to market-building, but success depends on demand creation, better MRV, broader policy support, and a portfolio of technologies. Expect early experimentation, uneven results, and eventual consolidation around the most scalable pathways.