You can read through some data on this site: http://www.wind-energy-the-facts.org http://www.wind-energy-the-facts.org It's maintained by the European Wind En

You can read through some data on this site: http://www.wind-energy-the-facts.org http://www.wind-energy-the-facts.org It's maintained by the European Wind Energy Association, so it is predictably pro-wind power. But their data does seem to indicate that wind can be economical if: 1. you put the windmills in good places, 2. the price of oil and gas goes up (which it has done), 3. technology improvements drive operation and maintenance costs down (which it has done). Their economic comparisons include CO2 emissions costs, since it is a European study and they do have an emissions trading program there.