At least two correct answers........do you need more?

Remember, in this world there is no free lunch - EVER!!!

Conventional wisdom: the energy required to overcome the additional drag/resistance will be more than what you will get back in energy produced, blah, blah, no free lunch, blah, blah...could it be that no one has yet designed the proper wind turbine devise that could actually produce more energy than any resistance produced. Buying into the assumptions of the day you are defeated even before you even start because you will never start to address the problem.

I just so happen to have such a concept/design, CAD design proven, patent pending and prototype soon to be constructed that I plan to drive across the country with limited batteries on-board and no stops for re-charging in a full sized SUV.

Now guys make all the comments you want, but beware, when my design is proven your words might taste mighty rancid. FYI, when eventually in production, will not cost any more than today's standard internal combustion engine systems.

Hey, I'll keep you all posted...