Nice to know there are "real" Earth Trojan asteroids:
http://www.cbc.ca/news/technology/story/2011/07/28/science-earth-trojan-...
http://en.wikipedia.org/wiki/2010_TK7
Doesn't look like prime real estate, with the small size and high inclination. Although it might have been useful for an old communications station that routed signals from Earth around the Sun until neutrino comms became standard.
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"The ruins of the unsustainable are the 21st century’s frontier."
— Bruce Sterling