As part of its first major retrofit in 30 years, two custom-designed wind turbines have started generating power for the Eiffel Tower. Located above the World Heritage Site’s second level, about 400 feet off the ground, the sculptural wind turbines are now producing 10,000 kWh of electricity annually, equivalent to the power used by the commercial areas of the Eiffel Tower’s first floor.
Read more: http://thinkprogress.org/climate/2015/02/24/3626338/eiffel-tower-gets-wind-turbines-installed/