With electricity cost going up and the likes of British Gas hiking up their price, everyone could use a bit of free energy. There are a number of ways to harvest renewable energy including solar and ...

Dale E. Berg, a member of the technical staff in the wind energy technology department at Sandia National Laboratories, replies The differences between wind turbine and ceiling fan blades arise from ...

WhalePower, based in Toronto, Ontario, is testing this wind-turbine blade at a wind-testing facility in Prince Edward Island. The bumps, or “tubercles,” on the blade’s leading edge reduce noise, ...