# Why Green Concrete Slashed Emissions Using Ancient Roman Chemistry

Page: https://stenobird.com/podcast/climate-economics-with-fexingo-carbon-pricing-green-policy-and-sustainability-costs-7871781/why-green-concrete-slashed-emissions-using-ancient-roman-chemistry
Text version: https://stenobird.com/podcast/climate-economics-with-fexingo-carbon-pricing-green-policy-and-sustainability-costs-7871781/why-green-concrete-slashed-emissions-using-ancient-roman-chemistry.md
Podcast: [Climate Economics with Fexingo: Carbon Pricing, Green Policy, and Sustainability Costs](https://stenobird.com/podcast/climate-economics-with-fexingo-carbon-pricing-green-policy-and-sustainability-costs-7871781)
Published: 2026-07-11T07:09:55+00:00
Episode link: https://audio.fexingo.com/business/climate-economics/episode-0104.mp3
Audio file: https://audio.fexingo.com/business/climate-economics/episode-0104.mp3
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JSON: https://stenobird.com/v1/public/podcasts/climate-economics-with-fexingo-carbon-pricing-green-policy-and-sustainability-costs-7871781/episodes/why-green-concrete-slashed-emissions-using-ancient-roman-chemistry
Duration seconds: 621

## Resource

Episode 104 of Climate Economics with Fexingo examines how a handful of startups and legacy cement manufacturers are reviving Roman-era chemistry to slash concrete's carbon footprint by up to 70 percent. Lucas and Luna break down the science behind lime-based binders and volcanic ash blends, then walk through the economics: how regulatory pressure, carbon taxes, and lower energy costs are making ancient recipes cost-competitive with Portland cement in select markets. They also explore the scaling hurdles—supply chain bottlenecks for natural pozzolans, building code inertia, and the challenge of convincing risk-averse construction firms. Specific case studies include a 2025 pilot in California that used a Roman-inspired mix for a freeway bridge, and a Norwegian plant that has retrofitted its kilns to produce low-carbon 'Roman' clinker. The episode closes with a forward-looking question about whether the construction industry's net-zero timeline depends on rediscovering old techniques rather than inventing new ones. #GreenConcrete #RomanCement #CarbonEmissions #ConstructionIndustry #LowCarbonMaterials #CementDecarbonization #AncientChemistry #LimeMortar #VolcanicAsh #IndustrialDecarbonization #ClimateTech #CCUS #NetZeroConstruction #BuildingMaterials #Economics #ClimateEconomics #FexingoBusiness #BusinessPodcast Keep every episode free: buymeacoffee.com/fexingo

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