Of all the energy sources in America, the
greatest of all may be oil shale. Oil shale is essentially a
rock. If you took it out and put in your hand,
it would probably look like most other rocks.
It would be a little bit lighter because it's fairly
porous. And, in that porosity is where the oil
rests. It doesn't flow freely. It's got to be
really nurtured out of there principally using heat. We have well over two-thirds of the
world's known supplies of oil shale.