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Jul 28, 2026

An "antacid" to fight climate change

Amy Scott, host of Marketplace’s climate podcast “How We Survive,” explores whether “artificial Tums” could increase the ocean’s capacity to absorb carbon dioxide.

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The LARC, or Lighter Amphibious Resupply Cargo vessel, used by researchers to monitor a marine carbon removal project in Duck, North Carolina.
The LARC, or Lighter Amphibious Resupply Cargo vessel, used by researchers to monitor a marine carbon removal project in Duck, North Carolina.
Amy Scott/Marketplace

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The ocean is already one of the best climate solutions we’ve got. It absorbs carbon dioxide from the atmosphere that would otherwise contribute to global warming.

But what if it could store even more CO2?

Marketplace’s Amy Scott, host of our climate podcast “How We Survive,” looked into one strategy to achieve that goal. And she set sail for a demonstration.

This feature is part of “How We Survive.” You can hear more of Amy’s reporting on marine carbon removal and other geoengineering solutions on their new season, wherever you get your podcasts.

The Team