“Living” Material Captures CO2, Could Reshape Buildings
Scientists have engineered a unique building material that actively absorbs carbon dioxide. This innovative substance utilizes living organisms to transform harmful emissions into solid components, potentially revolutionizing the construction industry and fighting climate change in the process.
How It Works
Researchers developed a 3D-printable hydrogel, a water-filled gel. This porous structure allows light, water, and CO2 to flow freely, keeping the algae alive. Cyanobacteria absorb CO2 from the air, storing it as biomass and minerals to strengthen the material.
Long-Term Absorption
In a 400-day study, the material continuously absorbed CO2, storing about 26mg of CO2 per gram. While algae growth slowed after a month, CO2 absorption through mineral accumulation persisted. The scientists envision using this material as a building wall coating.
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According to a 2023 report by the U.S. Environmental Protection Agency, buildings account for nearly 40% of carbon emissions in the United States (EPA 2023).
Public Display
The research team from ETH Zurich presented this material at an architecture exhibition in Venice, Italy. The design resembled tree trunks. Researchers believe that genetically engineering the cyanobacteria could further enhance the material’s efficiency.
Further research is exploring nutrient delivery systems to extend the material’s lifespan and effectiveness, promising a future where buildings actively contribute to a healthier environment.
