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Yes — multiple small-scale and research-focused geoengineering experiments and programs are underway or planned globally in 2024–2026, especially in solar radiation management (SRM), marine cloud brig...
Federal coordination on experimental geoengineering field tests has been built around monitoring, reporting, and research rather than a unified permit regime: NOAA acts as the primary reporting and ob...
experiments to date have been financed by a mix of university internal funds, philanthropic contributions channeled through university programs, venture-backed startups, and a handful of government in...
Available sources show the U.S. federal government has not approved or conducted any outdoor solar radiation management (SRM) field experiments since 2020; federal agencies state they are not engaged ...
Satellite sensors and in‑situ atmospheric monitoring can detect unusual aerosol loads, particle types and gas releases that would accompany many solar geoengineering schemes, and U.S. agencies are bui...
Documented, lawful research into solar geoengineering using aircraft exists: universities and startups are modeling or planning experiments that could use retrofitted or existing airplanes to disperse...
Several high-profile geoengineering field trials were halted or delayed in the last two years: Harvard’s SCoPEx stratospheric experiment was officially ended by university decision-making in March 202...
State-level bans on solar geoengineering have proliferated across the U.S., with more than 30 states introducing bills and a handful enacting or passing measures (for example Tennessee in 2024 and Flo...
Atmospheric scientists use a combination of chemical forensics, atmospheric observations, modeling-based “fingerprinting,” and institutional tracking to try to separate deliberate geoengineering signa...
Active field testing of active solar radiation management (SRM) is limited and small in scale: NOAA and a few research efforts have conducted atmospheric sampling flights and very small releases, whil...