Some very enterprising high school students have recycled scrapped sign posts, go-cart frames, fencing, and other parts into working vertical-axis wind turbines. The students are seniors in a green engineering course at Cape May Technical High School in New Jersey, and they raided their school’s maintenance scrap heap and hit up local businesses for parts that they could cut up and weld. The resulting turbines are capable of generating as much as 500W by harvesting the coastal town’s 20-knot winds.