Wind turbines are buildings in Tropico 3 and Tropico 4. They produce electrical power by using the force of the wind, which provides completely clean energy. Each turbine produces between 10 and 40 megawatts of electricity, depending on how high up the turbine is built; turbines on hills and mountains receive more wind than those on beaches or pastures.
Wind turbines become obsolete in 1975, when they're replaced by solar power plants.