U.S. Patent Issued to Hughes Aircraft Co. Proposing Injecting into the Upper Atmosphere, a “very fine, white talcum-like” Powder for the Stated purpose of Reducing Global Warming”
In 1991 a U.S. patent was issued to Hughes Aircraft Company; the Stratospheric Welsbach Seeding For Reduction of Global Warming Patent (#5,003,186). It proposed injecting …
