Satellites are making it possible to study the interactions on Earth between urbanization, biological processes, weather and climate. What are they showing us? In an illustrated presentation at the Library of Congress, a NASA scientist will explain the profound effect of human activity on Earth´s natural systems.

Marc L. Imhoff will discuss "City Lights, Spy Satellites and Urban Sprawl" at 11:30 a.m. on Wednesday, June 27, in Dining Room A on the sixth floor of the James Madison Building, 101 Independence Ave. S.E., Washington, D.C.

The lecture is the third...

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