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Eco-photos of the week: May 1-7

May 6, 2011, 8:10 a.m.
First Lady Michelle Obama welcomes young students arriving at the White House on May 1 as part of Regis and Kelly's Run Across America with Dean Karnazes.

Photo: ZUMA Press

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Students participate in Run Across America

First lady Michelle Obama welcomes young students arriving at the White House on May 1 as part of Regis and Kelly's Run Across America with Dean Karnazes.

Karnazes is on a 75-day journey, running 40 to 50 miles a day from California to New York to promote healthy eating and exercise.