Some may wonder why the oil refineries in the United States cannot be counted on to produce enough fuel for the country, or least a great proportion of what is needed. Unfortunately, the current petroleum infrastructure within the United States in regards to refineries and pipelines is adding to the lower production of fuel within the country. As world events such as those described above occur, limiting supply, the demand for gasoline is hardly decreasing. In fact, it seems to be on a constant incline, exerting continued pressured on the price of fuel. It is a simple case of supply and demand: when demand is fixed or increasing, a decrease in supply causes prices to rise.