Wind farms not environmentally neutral

According to the Globe and Mail:

"A group of Canadian and U.S. scientists reported Tuesday that computer simulations show that a large-scale use of wind farms to generate electrical power could create a significant temperature change over Earth's land masses.

"While the precise tradeoff between the climate changes from wind farms versus that from carbon-based power systems is still a matter of contention, the fact that wind power isn't climate neutral leaps out of the simulations."

And no, I don't routinely read the Globe and Mail. It was linked to by the excellent Slashdot.