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A 2025 SpaceX rocket re-entry over Europe released lithium into the upper atmosphere, a new study finds, raising concerns about unregulated pollution at high altitudes.
A German study published on February 19, 2026, reports the first direct measurement of pollution from a rocket re-entry, detecting a 10-fold increase in lithium in the upper atmosphere after a SpaceX Falcon 9 upper stage burned up over Europe in February 2025.
Using ground-based lidar, researchers traced the plume to a site west of Ireland, confirming that rocket debris releases exotic metals into the "ignorosphere"—a hard-to-study region between 50 and 100 kilometers altitude.
The findings highlight growing environmental concerns as thousands of new satellites are planned, warning that even small emissions at high altitudes could significantly impact climate and ozone systems, yet no regulations currently exist for upper atmospheric pollution.
Un nuevo estudio encuentra que el reingreso de un cohete SpaceX sobre Europa en 2025 liberó litio en la atmósfera superior, lo que genera preocupaciones sobre la contaminación no regulada a grandes altitudes.