Across the planet, basalt rock deposits on the sea floor have the potential to trap carbon dioxide, removing the heat-trapping gas from our atmosphere. First, the scientists need about $60 million to test a prototype at sea. Basalt rock is highly reactive, full of metals that readily grab CO2 and chemically combine with it to form carbonate minerals. AdvertisementSolid Carbon scientists say carbon rock is stuck on the sea floor for thousands of years. They also argue that in the ocean, there's plenty of room to scale up and little risk of disgruntled neighbors fighting the project.

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Persons: Martin Scherwath, it's, David Goldberg, who's, Scherwath, Goldberg, that's Organizations: Service, Business, Ocean Networks, Ocean Networks Canada, Columbia University, National Academies of Science, Engineering Locations: Cascadia, Vancouver, That's, Canada, Iceland, Paris, Elliott Bay, Seattle