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The Sky Cracks Open: EPA Director Zeldin’s Inquiry into Geoengineering Marks a Turning Point
With the EPA finally addressing atmospheric modification, decades of denial may be giving way to long-overdue oversight.
Apr 16
 
 
 
 
 
 
 

 
We are witnessing something extraordinary. After decades of denial, deflection, and derision, the U.S. executive branch—through the Environmental Protection Agency (EPA)—has formally opened a federal inquiry into geoengineering activities carried out by a private startup, Make Sunsets. The letter, issued April 14th by the Office of Air and Radiation, demands detailed disclosures on the company's deployment of sulfur dioxide into the atmosphere—a controversial solar radiation modification (SRM) tactic long derided as conspiracy when spoken aloud by the public.

“The EPA is evaluating whether Make Sunsets is subject to the Clean Air Act by adversely impacting air quality.”
— EPA, April 14, 2025