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 into the upper atmosphere, a “very fine, white talcum-like” powder of aluminum oxide, barium oxide and other oxides for the stated purpose of reducing Global Warming”. Publication number US5003186 A Publication type Grant Application number US 07/513,145 Publication date Mar 26, 1991 Filing date Apr 23, 1990 Priority date Apr 23, 1990 Fee status Paid Inventors David B. Chang, I-Fu Shih Original Assignee …
Read More