In 2017, Stafford Sheehan was a chemist working on artificial photosynthesis, coming up with metal-based catalysts that’d mimic the way living things acquire energy from the Sun. He did not expect to create a martini that could save the planet. Sheehan had an invention, a box that could electrolyze a burst of carbon dioxide and a dose of water. Run all that over a metal catalyst to goose a biochemical reaction, and, presto: renewable fuel made from air.
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