The impact of contrails extension

Dr. Patrick Minnis of the Langley Research Center, run by the U.S. National Aeronautics and Space Administration (NASA) in Hampton, Va., used satellite images to find that in just a few hours, six contrails formed by air-force jets spread out to cover more than 20,000 square kilometres.
source: Planes, Air Pollution and Global Warming See also XlnkS4C4

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