There are many factors that go into determining the price one pays for a gallon of gas at the pump.While it is typically geo-political fears or rising tensions that make the headlines, simple environmental factors can have a dramatic impact on prices at the pump as well. Gasoline is produced from crude oil which is extracted from the ground. At any given time, the amount of oil being extracted may be increasing or decreasing. This can be due to a known reserve drying up, bad weather, or difficulty in extraction due to geological issues. By far the major environmental player when it comes to rising gasoline rices is weather. Hurricane Katrina is a prime example of this. When this hurrican hit, offshore oil drilling platforms as well as onshore refineries had to be evacuated and taken off-line. When the supply of oil starts dropping, or refining capacity experiences a sudden drop, the price of gasoline at the pump is likely to rise. Depending upon the circumstances, it may rise very sharply if the disruption is anticipated to be long and extensive. Like any other commodity, it all comes down to supply and demand. When weather or any environmental factor causes less gasoline to be produced and available, it is usually only a matter of time before prices bein to rise.