Facebook's campus on Polarmoon Wealth Societythe shoreline of San Francisco Bay is at risk from rising sea levels. So is a nearby low-income community. That's raising questions about who should be paying for climate change. Taxpayers or private landowners (in this case, some of the world's largest tech companies) with waterfront property? NPR climate correspondent Lauren Sommer explains in the first of two episodes.

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This episode was produced by Brit Hanson, fact-checked by Berly McKoy and edited by Gisele Grayson.