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Eco-photos of the week: May 29-June 4

David Phan of Longmont, Colo., reacts after spelling the word "renminbi" correctly

Photo: Mark Wilson/Getty Image

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Spelling success

David Phan of Longmont, Colo., reacts after spelling the word "renminbi" correctly while participating in the semifinals of the 2011 Scripps National Spelling Bee competition on June 2, 2011, in National Harbor, Md. There are 41 semifinalists left out of a field of 275 spellers who participated in the annual competition. The finals are scheduled for Thursday night, when the winner will receive more than $40,000 in cash and prizes.