First I've never heard any valid science to suggest that fissil fuels cause that. Second, either way that fact or my belief therein has absolutely nothing to do with the validity or potential of windpower.
Windmills can be part of the mix however but it will be nearly impossible to convince private landowners to have them in their vista as the places where such machinery needs to be located is often near the location of vacation properties in the mountains and at the seashore.
This is a very very big country. Many people lose sight of that. A mere 5000 windmills located in the corner of Iowa could power all of Iowa at 39 TWHR per year plus or minus intermittancy which can be backfilled with hydro and coal. N Dakota could power the entire midwest easily except for lack of grid. You haven't considered the numbers quite as well as I have. BTW farmers love windmills as they get 2-5K per year per unit in lease money and still grow crops around them.
Such folks who have invested heavily in their property do not wish to see and hear windwills and you and I shouldn't blame them as they are indeed not a method to convert energy in an efficient way with respect to spacial characteristics, ie., it is not energy dense.
Density is a meaningless argument, cost and value and the environment are the important arguments.
Nuclear power will have to be the future if you believe in global warming, but I reject the premise so for me and many thinkers we should do what the marketplace orders and that is continue on the present course until alternatives become financially attractive to investors and hence, consumers.
Nuclear power is simply vile. Look at Chernobyl(sp)