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Next-generation geothermal could be a huge source of carbon-free power. A first-of-a-kind project from Google and Fervo Energy is a step in that direction.

Fast-moving companies governed by science and openness tend to succeed, but CEOs like Musk and Zuckerberg show what happens when egos get in the way.

Big fleets backed by public money are removing fish from the world’s oceans at unsustainable rates. Can a new treaty help?

Less parking could pave the way for denser housing and more accessible public transportation.