In this Nov. 30, 2017 photo, a river scavenger shows a silver cross he found at the bottom of the polluted Guaire River, in Caracas, Venezuela. Scavengers rake their hands across the river bottom and let the gravel and rocks fall through their fingers, scanning for an earring backing, lost rings or any bits of precious metal to cash in for food. (AP Photo/Ariana Cubillos)
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