"On the far western edge of Golden Gate Park stand two wooden windmills that were built to pump groundwater for irrigating the park's lawns and gardens, helping to transform the dunes that once covered the area."
"The video opens with "Energy 101: Wind Turbines." This is followed by wooden windmills on farms. We've all seen those creaky, old windmills on farms. And although they may seem about as low-tech as you can get, those old windmills..."