Currently, a U.S. company or citizen with plans to inject aerosols into the atmosphere is required to fill out a one-page form with the Commerce Department 10 days before they do so, thanks to a law from the 1970s that requires reporting of efforts to modify the weather.

That’s not enough, say academics and researchers who are urging the government to expand their rules governing private firms’ solar radiation modification efforts. It’s part of a broader push to regulate small-scale geoengineering experiments that are already happening.