CHRIS KNAPTON / SCIENCE PHOTO LIBRARY CHRIS KNAPTON / SCIENCE PHOTO LIBRARY
Wind turbines. Wind power is a renewable and clean source of energy for electricity production. The wind turns the blades, and this drives a turbine to generate electricity. Here, in southwest Spain, Europe is seeing one of the largest expansions of wind farms to take advantage of the strong Atlantic winds (as of 2008). Photographed in countryside just north of Tarifa, Spain.
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