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Eco-photos of the week: Aug. 7-13

Aug. 12, 2011, 9:15 a.m.
Sunflowers flail around in the wind underneath a chilly, overcast sky in a field in Cologne, Germany on Aug. 9.

Photo: Oliver Berg

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Sunflowers in Cologne

Sunflowers flail in the wind underneath a chilly, overcast sky in a field in Cologne, Germany, on Aug. 9.

Cologne has a cool climate all year around, with average summer temperatures rarely rising above 70 degrees.