The cost of taking them down is not so high on a per turbine basis; you should also expect that in a few years, most useful sites will have been taken, and turbiens will be taken down - to put bigger ones in the same, already approved, spot... In the long run, we're all dead. John Maynard Keynes
Anyway that is good news, but I was actually more thinking of possible lingering environmental effects from nuclear and coal plants sites. I do not know what they might be, but I guess the dismantling of Barsebäck here in Sweden might give a hint.
If there are such effects it would of course push the calculus in favor windpower. A vote for PES is a vote for EPP! A vote for EPP is a vote for PES! Support the coalition, vote EPP-PES in 2009!
