RE:RE:RE:RE:RE:RE:RE:RE:A Perspective on OilI should mention that one of the serious obstacles to the greater use of crude has been a worldwide constraint on refining capacity. That however is more curable than most of the other forms of energy provision. It is also possible to directly combust many types of crude if need be. My conclusion remains, the world will need crude for a very long time indeed (until someone invents fairy dust )