US answer to global warming: reflective dust and giant space mirrors

Smog above Phoenix, Arizona – US report suggests reflective dust could reduce warming. Continued at Guardian UK

Best Evidence "Chemical Contrails"
Millions of people have seen them; jet aircraft vapor trails lingering in the sky. Are these just regular "contrails," the carbon and water vapor exhaust from commercial planes, or are they potentially toxic "chemical trails"?
February 8th on the Discovery Channel

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