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Of all the ideas that circulated during the recent American Geophysical Union meeting at the Moscone Center, one of the most outlandish-sounding schemes was from a San Francisco entrepreneur who claims he can help conquer climate change by sprinkling pebbles on tropical beaches.

The proposal appears, to the uninitiated, to be a first-class boondoggle, but California’s top climate scientists not only support the notion that rocks can sequester carbon, they are clamoring for viable experiments to test the theory.

Could putting pebbles on beaches help solve climate change?

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