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Flu Patients

Photo: Nurses and flu patients in tents
Under siege by the Spanish flu epidemic of 1918, nurses in Lawrence, Massachusetts, treat patients in an outdoor hospital. Canvas tents kept the sick separated and less likely to spread the deadly virus. And with the success of fresh-air therapy on tuberculosis outbreaks, public health officials strongly recommended taking them outside.
Photograph by Hulton Archive/Getty Images

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Photo: Hot spring in Ethiopia's Danakil Depression

Pathways to a Greener World

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2008 Grand Prize Winner

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See who won this year’s grand prize trip to the Grand Canyon!

The Green Guide

Photo: Green flower

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Photo: Two penguins

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