Literally unearthing a climate solution with Cody Finke of Brimstone

Hello and welcome to how I built this lab. I'm Guy Raz. So when it comes to carbon emissions, there are the usual suspects we hear about all the time fossil fuels, livestock, transportation. But there are other sources of carbon emissions that are less flashy, but just as impactful on our climate, including a material you might be standing on right now, which is Cement.

Yes, cement. We use it to glue together just about everything we build. But the production of cement worldwide actually emits almost as much carbon as cars do. The majority of that carbon comes from one of the main ingredients in cement, which is limestone. To make cement, you basically cook limestone at high temperatures.

But limestone is actually a carbon sink. It contains a lot of carbon, and when you heat it up to make cement, that carbon is released into the atmosphere. Well, my guest today says there's another way to make this critical building material. Cody Finke discovered the concrete problem when he was studying chemistry at Caltech. he realized there was a different rock that could replace limestone in concrete production. It's a rock that

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