Apparently it is not nonsense for the US Government. Can you find
"chemtrails" spelled in the US bill H.R.2977.IH.
"Space Preservation Act of 2001"?
Official link: Bill Text - 107th Congress (2001-2002) - THOMAS (Library of Congress)
Or, we could perhaps look at some patents, like 1991 US Patent 5003186, "Stratospheric Welsbach Seeding for Reduction of Global Warming";
Official link: United States Patent: 5003186
QUOTE:
"One proposed solution to the problem of global warming involves the seeding of the atmosphere with metallic particles. One technique proposed to seed the metallic particles was to add the tiny particles to the fuel of jet airliners, so that the particles would be emitted from the jet engine exhaust while the airliner was at its cruising altitude."
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All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident. - Arthur Schopenhauer