https://www.fastcompany.com/90761039 /these-rechargeable-batteries-are-more -sustainable-and-safer-than-lithium-and-half-the-cost Since lithium-ion batteries were first sold 30 years ago, they’ve dropped in cost by 97%. But they’re still too expensive for making electric cars that can compete in cost with fossil-fueled cars without subsidies, or to economically store wind and solar power on the grid. That’s why one Boston-area startup is developing
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