It is something that peak oil advocates have been warning us for a long time; our world using up our last reserves of oil. While the day that the last drip of crude is burned up is a long ways out, some parts of the world may be heading for a major pinch in production. As our world population continues to expand, with the total predicted to hit nine billion by 2050, our addiction to crude only increases, as we use oil for a wide number of things in our daily lives. Besides its most dominant use as a fuel for automobiles and the like, oil is also used in a number of other processes like the production of plastics and variety of other industrial outputs [see also Ultimate Guide To RBOB Gasoline Investing].