Eureka! A Whisper-Quiet Wind Turbine Based On Archimedes' Screw

When they're standing out in a field, miles away from crowded urban centers, the sounds made by a wind turbine's blades aren't a big issue. But when they're perched atop a downtown building, they create noise pollution that's hard to ignore. A Rotterdam-based company might have found a solution, though, with a unique… » 5/28/14 1:20pm 5/28/14 1:20pm