As T. Bone is NOW saying on his adverts., the REAL fill in between oil and the salad mix of energy necessary to zero out our foreign dependency, is natural gas. As we have access to untold thousands of billions of cubic feet of natural gas, and it can be converted into CNG, LNG, Diesel, gasoline, oil, plastics etc etc, he's correct.
The anchors of energy will be nuclear and oil for at least another century, tho..