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Monday, November 23, 2009 |
Monday, November 23, 2009 |
Photo: Scentless Spring? Flower Smells Blocked by PollutionInsect pollinators may be in trouble as growing levels of air pollution in the U.S. mask the come-hither scents emitted by flowers, a new study says. Photograph by George F. Mobley/NGS
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ADVERTISEMENTNATIONAL GEOGRAPHIC'S PHOTO OF THE DAY |
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