http://ngm.nationalgeographic.com/2008/11/light-pollution/klinkenborg-text
The waste of upward directed street lights.
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http://ngm.nationalgeographic.com/2008/11/light-pollution/klinkenborg-text
The waste of upward directed street lights.
This entry was posted on August 10, 2012 at 12:52 am and is filed under PopSci.
Tags: energy, environment
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