Exclusive: How one founder plans to save cities from flooding with terraforming robots | TechCrunch
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Exclusive: How one founder plans to save cities from flooding with terraforming robots | TechCrunch
"The canal district is really far under sea level,"
"The answer, every answer every time, has been like $500 million to $900 million of seawalls, which if you're from San Rafael, you know they're not even close to being able to afford that. There's about 60,000 people and a significant portion - surprisingly for a city in Marin - are living in poverty."
Parts of San Rafael are sinking about half an inch per year, and the Canal District has subsided roughly three feet, increasing flood risk from sea level rise. Cities worldwide face rising seas, with an estimated 300 million people at risk of routine flooding by 2050 and U.S. seawall construction costs potentially exceeding $400 billion. Terranova plans to deploy robots that inject a slurry of wood waste into the ground to gradually lift land, correct historical subsidence, and reduce flood exposure. The company quoted $92 million to lift 240 acres by four feet in San Rafael and raised a $7 million seed round valuing the company at $25.1 million. Terranova emphasizes novel, lower-cost approaches and inexpensive waste wood as material.
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