CHRIS KNAPTON / SCIENCE PHOTO LIBRARY CHRIS KNAPTON / SCIENCE PHOTO LIBRARY
Renewable energy. Two wind turbines can be seen at upper centre. 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. Below, a man is carrying wood, a natural fuel, which casts a shadow that echoes the shape of the wind turbines.
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