A new paper suggests that wind turbines, installed broadly, might actually change the climate themselves just by disrupting the normal flow of the wind:

In a paper published online Feb. 22 in Atmospheric Chemistry and Physics, [the MIT researchers] Wang and Prinn suggest that using wind turbines to meet 10 percent of global energy demand in 2100 could cause temperatures to rise by one degree Celsius in the regions on land where the wind farms are installed, including a smaller increase in areas beyond those regions.

Read more: http://www.good.is/post/could-wind-turbines-actually-warm-the-globe#ixzz0i9u2kXfD