French designers/engineers have proposed retrofitting existing transmission towers with wind turbines as a means of generating green power without requiring more land to be ceded to wind farms (part of the Next Generation competition).
The pictures below speak for themselves. I imagine the prairies in particular would have vast stretches of power lines that would be suitable for such an upgrade, though I question the ability of these small, closer to the ground turbines to hit the same level of ROI as freestanding ones. Whatever the case, a great example of innovative thinking.
EDIT: Also see LAT on training tomorrow’s green workforce.