| http://www.w3.org/ns/prov#value | - [1] For example, Hughes Aircraft Patent #5,003,186 ??? the Stratospheric Welsbach Seeding For Reduction of Global Warming 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.
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