One wind turbine, depending on its size, is comprised of 10 to 25 tons of iron castings that range in weight from less than 100 lb to as much as 80,000 lb, states the American Wind Energy Association ...

Drones and crawling robots outfitted with special scanners could help wind blades stay in service longer, which could lower the cost of wind energy at a time when blades are getting bigger, pricier, ...