Disrupting Earth’s chemical cycles brings trouble. But planet-warming carbon dioxide isn’t the only element whose cycle we’ve turned wonky—we’ve got a phosphorus problem too. And it’s a big one, because we depend on this element to grow the world’s crops. “I don't know if it would be possible to have a full world without any mineral phosphorus fertilizer,” says Joséphine Demay, a PhD student at IN
When Hans Eric Melin thinks of battery waste, he imagines American driveways filled with electric vehicles. They look much like the gas-powered cars of yesterday, large and handsome and well-equipped: family-haulers, boat-towers, off-road ready. They also do things that those cars didn’t do, like go from zero to 60 in three seconds and travel 400 miles without emitting any carbon. The trade-off is
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