That looks cool and all, but what exactly is holding them up there? and what if the wind dies down? I know this isn't the ultimate discussion here, but the ideas that are being tossed around atleast have to be somewhat realistic. How many of those can we possibly put up there if we really could? Since energy is such an important part of our lives, I think there should be certain locations in our country that are set aside geographically strategic places simply to produce renewable energy, ie. solar, wind, etc..