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Forrest M. Mims III
Contrail spe
cialist Dr. Lin Chambers of NASA's Langley Research
Center gave a talk at the annual meeting of the
Society for Amateur Scientists at the University of
Nevada. While she spoke, the sky over the building
was rapidly filling with contrails from high-flying
aircraft. Contrail displays like the one shown here
reduce sunlight so significantly that they slow the
normal warming of the day. Satellite images of contrails
show that they can sometimes cover large segments of
the sky.
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