Petrolium is a huge concern.   We can make electricity from coal, nuclear, wind, solar, biomass, natural gas, hydro and geothermal.

We basically can only make petrolium from oil.   Bio Diesel is a nice option but way too small to have a serious impact.

Experts say there are 1 trillion barrels of oil in the earth. We currently use about 30 billion barrels a year and with India and China, it is growing by 1-2 billion barrels a year.   Do the math.

We have about a 25 year supply.   Lets suppose the experts are wrong and we have two trillion barrells left- double what we thought.   That only buys us 11 more years at the projected growth rates.

Hyrogen will allow us to run cars from coal or nuclear, but it will not be mainstream until 2020 according to the people I spoke with at the Hydrogen energy park in Southfield Michigan.   (rode in a hydrogen car- pretty cool)

Oil will continue to get more expensive as it is harder to find and more expensive to extract.   

I said these things on a nationally synidcated radio show a few months ago and my friend accused me of trying to scare everybody.   He doesn't say that today.