The speed by which wind farms are being constructed across the U.S. is going faster than a spring wind in Casper. In about 20 years, the wind turbines put into operation today will be nearing the end of their lifespan. The ones built 20 years ago are nearing it now. Since the blades are very difficult to recycle, the waste stream created by the retired blades is a mounting problem. According to a 2017 study published in the scientific journal Waste Management, the world’s wind industry will be producing 43 million tons of blade waste annually by 2050.