SIMON FRASER / SCIENCE PHOTO LIBRARY SIMON FRASER / SCIENCE PHOTO LIBRARY
Wind power. View of a large wind farm in California. Wind turbines are an important form of alternative power for electricity generation. They produce no emissions and have a low running cost. Modern turbines, which may vary the pitch of the blades, may adjust to varying wind speeds automatically, ensuring a more constant supply. The main drawbacks of wind power are a high initial capital cost and noise from the turbines. This area of California, San Gorgonio Pass, has about 3500 wind turbines, producing 600 million kilowatt-hours of electricity per year, enough to supply a town of 100,000 homes.
Model release not required. Property release not required.