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House subcommittee hears sharply divided expert views on geoengineering, seeks oversight
Summary
A House Oversight and Reform subcommittee hearing on Sept. 11, 2025, featured sharply different accounts from scientists and policy specialists on geoengineering and weather modification. Witnesses recommended more research and reporting, while members debated regulation, international controls and the Environmental Protection Agency’s role.
WASHINGTON — On Sept. 11, 2025, the House Oversight and Reform Subcommittee on Delivering on Government Efficiency convened a hearing on weather modification and geoengineering, calling experts to testify about the scientific uncertainties, possible environmental harms and gaps in U.S. oversight.
The hearing drew testimony from three invited witnesses who offered contrasting views about risks and policy responses. Roger Pilkey Jr., a senior fellow at the American Enterprise Institute, urged Congress to order authoritative study and new laws to strengthen reporting and oversight. Christopher Martz, a meteorologist and policy analyst, emphasized uncertainties about efficacy and potential harms from large-scale solar radiation modification. Michael McCracken, chief scientist for climate change programs at the Climate Institute, said research is warranted and maintained there is no current global-scale geoengineering deployment.
Pilkey recommended that Congress request a National Academy of Sciences assessment “that…
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