Adam Baske, business development manager for Portland’s Running Tide Technologies, holds a PVC tube wrapped in kelp-coated twine. Once overboard off Scarborough, the kelp will grow, then taken to the open ocean to be sunk for millennia. The fight against climate change has long focused on scaling back humanity’s emissions of planet-warming carbon-dioxide. But a movement is growing to think bigger and find ways to actually pull existing CO2 out of the air and lock it up somewhere safe. One Maine startup has an innovative approach that’s drawing attention from scientists and investors: grow massive amounts of seaweed and then bury it at the bottom of the deepest sea, where it will sequester carbon for thousands of years. On a fishing boat a few miles out in the Gulf of Maine, Capt. Rob Odlin and Adam Rich are tossing buoys into the water. Each is tethered to a rope entwined with tiny seeds of kelp, a fast-growing seaweed. “We’re just fishing for carbon now, and kelp’s the net,” Odlin says. The project is experimental R&D for a company called Running Tide Technologies , based on the Portland waterfront. Marty Odlin, the boat captain’s nephew and the CEO of Running […]

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