HOW TO HOLD BACK THE OCEAN (ENCORE)

More and more coastal communities want to build sea walls to prevent catastrophic flooding because of rising sea levels. But do they work? We talk about the risks of the planned seagates in New York, and we visit Sapelo Island, Georgia to learn about how the Gullah Geechee community plans to defend their ancestral lands by using a natural shoreline, built of oysters.


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