Re-carbonizing the sea: Scientists to start testing a big ocean carbon idea

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By Jeremy Hance Imagine showers of little green sand grains drifting through the ocean: collecting on coral reefs, rolling off the backs of whales, sprinkling schools of tuna — and helping to save all those creatures, and humanity, too. At least that’s the idea. These green showers are crushed olivine, an abundant volcanic mineral, delivered by a fleet of ships. And it is climate change that launched these thousand ships, crisscrossing the ocean in a surreal bid to undo the damage we’ve done. You see, as the olivine settles on the ocean floor it disintegrates and chemically transforms, making …

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