Guys, I think this is fairly simple. We are not talking about "running out of oil," we are talking about how much is going to be available at a specific price point. When we "run out" of $75/barrel oil, it will become cost effective to extract $100/barrel oil. At some point the demand will reduce significantly (although no one seems to know where that price point is) and the price will reach an equilibrium again. The inevitable part is that the cost will increase, the question is how much and how fast. At some point, alternative sources (bio-diesel, etc.) will actually become viable without any subsides, then we will see them widely available. Who knows, maybe within 5 or 10 years the diesel fuel market will be 15 or 20% bio-diesel, maybe sooner, maybe later.