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Eco-photos of the week: May 15-21

May 20, 2011, 5:25 a.m.
Cyclists race along winding California roads of Sacramento Valley on May 16 as part of Amgen's Tour of California, the largest cycling event in the United States.

Photo: ZUMA Press

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Amgen's Tour of California

Cyclists race along winding California roads of Sacramento Valley on May 16 as part of Amgen's Tour of California, the largest cycling event in the United States.