The Technoptimist Show 7/7/21: A Machine That Makes Seashells out of CO2

Join Teresa Carey as she breaks down the latest news on the technology that is solving the world’s biggest problems. In today’s show, Teresa covers subterranean microbes in the fight against climate change, artificial intelligence at McDonalds, and a machine that turns carbon dioxide into seashells.

To learn more about the topics:
How Subterranean Microbes Are Devouring Carbon Emissions
McDonald’s Is Replacing Human Drive-Thru Attendants With AI
This Machine Will Make Seashells Out of CO2
Should We Genetically Engineer Carbon-Hungry Trees?
How Balloons Could Soak Up Carbon and Fight Climate Change

About the host:
Teresa Carey is a senior staff writer at, where she covers genetics and the environment. She is also a US Coast Guard licensed captain and a NatGeo Explorer. In addition to Freethink her work can be found in BuzzFeed, Scientific American, PBS NewsHour, NPR Weekend Edition, Smithsonian and more. @teresa_carey