Sierra has sold out the wind industry. John Muir would roll over in his grave. INDUSTRIAL WIND TURBINES DO NOT PROVIDE CLEAN ENERGY and do practically nothing to mitigate climate change! Not one coal or gas plant the world over has been decommissioned because of IWTs...and eliminating our dependence on fossil fuels is their stated purpose. To quote an expert: "Because wind blows intermittently, electric utilities must either keep their conventional power plants running all the time to make sure the lights don't go dark, or continually ramp up and down the output from conventional coal-or gas-fired generators (called "cycling"). But coal-fired and gas-fired generators are designed to run continuously, and if they don't, fuel consumption and emissions generally increase." This is happening worldwide, and in places like Colorado and Texas where CO2 and power plant pollution have increased since installing wind farms:
http://www.forbes.com/2011/07/19/wind-energy-...
http://www.clepair.net/IerlandUdo.html
http://www.thespec.com/news/ontario/article/6...
http://articles.baltimoresun.com/2011-07-25/n...
The wind industry is built on crony capitalism, it is the only way it can exist. Taxpayer money builds them and power companies are mandated to buy wind generated power at much higher rates than conventionally produced power. There is no true benefit, except to wind power companies, politicians and lobbyists. If Renewable Energy Credits were only issued for carbon reduced instead of megawatts produced, there would be no wind turbines as they don't significantly reduce carbon.