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Electric Plant, Spain

Photo: Rows of mirrors at an electric plant

This Month in Photo of the Day: National Geographic Magazine

At an electric plant in southern Spain, mirrors as big as houses catch some of the 120 quadrillion watts of sunlight that constantly fall on Earth. Government subsidies for this pricey yet promising power source have made Europe the world's solar capital.

See more photographs from the September 2009 feature story "Plugging Into the Sun."