TED Talks Daily The material that could change the world... for a third time | TED-Ed
Apr 10, 2021
Concrete surrounds us, but its production significantly contributes to climate change. Discover how this essential building material, once a marvel of innovation, is now under scrutiny. Scientists are exploring sustainable alternatives to reduce its environmental footprint. The podcast also delves into the historical significance of concrete, from Roman times to today, and the urgent need for reinvention to combat climate issues. Innovations in this field could change our world for the better.
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Concrete's Impact
- Concrete is crucial for modern infrastructure, but its production significantly contributes to global warming.
- Cement, a key ingredient, releases substantial carbon dioxide during its creation.
Cement's Carbon Footprint
- Cement production inherently generates CO2 because creating calcium oxide from limestone releases carbon dioxide.
- Every ton of cement produced results in a ton of CO2 emissions.
Cleaner Concrete Solutions
- There's no completely emissions-free concrete yet, but promising solutions are emerging.
- These include using clean energy for heating limestone, carbon capture, and altering concrete's chemical composition.
