"HeyBub" wrote in
m:

But what are the consequences of interrupting surface wind flow? Will
it affect the weather? Crop pollination? A dog's sense of direction?

I'd guess that is minimal. Possibly the biggest drawback is hitting and
killing flying creatures.

It's said that in some parts of Texas, one can't have more than one
windmill per acre or all the wind will get used up!

Given the size of the propeller, I would suggest the same, if indeed an
acre is ~208 feet squared. Since the biggest rotors have a diameter of 400
feet, more than 4 acres seems better
http://www.youtube.com/watch?v=LQxp6QTjgJg

--
Best regards
Han
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