Jim Franke pulls away the cover page of a presentation on the wraparound desk in his office, revealing an illustration of an odd-­looking aircraft with massive wings stretching out from a stubby fuselage. The uncrewed plane is soaring thousands of meters higher than commercial jets fly—so high you can see the curvature of the Earth.…

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🔗 原文链接：https://www.technologyreview.com/2026/06/17/1138743/hacking-atmosphere-geoengineering-reality-check/