Building a decarbonization army with Shashank Samala of Heirloom

What this episode covers

Shashank Samala, co-founder and CEO of Heirloom, explains how his company built North America’s first operational direct air capture facility in Tracy, California, using a novel limestone-based process to remove CO2 from the atmosphere. Samala details the technical approach of baking limestone into calcium oxide to create 'trays' that absorb CO2, contrasting this with expensive synthetic materials used by competitors like Climeworks. He discusses the business model, noting that Heirloom sells carbon removal credits to major corporations like Microsoft, Stripe, and Meta, aiming to scale production to 1 million tons per year by leveraging the Inflation Reduction Act’s 45Q tax credits. The episode covers Heirloom’s journey from a garage-stage startup to scaling production, highlighting their goal to build 1,000 facilities globally to remove 1 billion tons of CO2 annually by the 2030s.