Tackling climate change now requires not just reducing planet-warming emissions to zero, but also finding a way to draw down existing carbon dioxide from the air. Over the past few years, tech companies have taken the lead to seed hundreds of startups that want to sell carbon removal credits and help companies meet climate goals. But the failure of a major startup, Running Tide, has raised questions about the long-term viability of the market. This week on Zero, we hear from Nan Ransohoff, head of climate at Stripe, and pioneer of the carbon-removal market.

Explore further:

• Past episode with Jennifer Wilcox of the US Department of Energy’s two gigantic carbon removal hub projects 
• Past episode with Mark Trexler of The Climatographers about what’s wrong with carbon offsets and how to fix them
• Past episode with Notre Dame professor Emily Grubert about the state of carbon capture

Zero is a production of Bloomberg Green. Our producer is Mythili Rao. Special thanks this week to Kira Bindrim, Alicia Clanton, Anna Mazarakis and Jessica Beck. Thoughts or suggestions? Email us at zeropod@bloomberg.net. For more coverage of climate change and solutions, visit https://www.bloomberg.com/green.