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NASA | Imported Dust in American Skies

NASA and university scientists have made the first measurement-based estimate of the amount and composition of tiny airborne particles that arrive in the air over North America each year. With a 3D view of the atmosphere now possible from satellites, the scientists distinguished dust from pollution, and calculated that dust is the main ingredient of these foreign imports.This video is public domain and can be downloaded at: ?http://svs.gsfc.nasa.gov/goto?11068Like our videos? Subscribe to NASA's Goddard Shorts HD podcast:?http://svs.gsfc.nasa.gov/vis/iTunes/f0004_index.html?Or find NASA Goddard Space Flight Center on facebook:?http://www.facebook.com/NASA.GSFC?Or find us on Twitter:?http://twitter.com/NASAGoddard?
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