I have seen T Boone on Cavuto make the case that we could become independent pretty much by fueling the heavy commercial fleet with natural gas.
He is basically a good ol’ boy, but a smart good ol’ boy. T Boone has spent a good bit of time as an elder good ol’ boy studying the problem. Being old and free from the restraints of those not retired frees one’s mind to think beyond the limits of day to day. He has done just that.
The problem now boils down to devising and implementing the transistion.
It should also be pointed out that natural gas is only this cheap because demand for it is relatively low. Throw the vehicle population of the US in there and watch prices skyrocket. Remember, the natural gas vehicles would then be competing with powerplants for the natural gas that’s out there. Then you can have expensive vehicle fuel and ridiculous electric bills at the same time.