fossil fuels [is] a limited resource. To put this in perspective: the Earth' crust contains 2.1 quadrillion barrels of oil. At a consumption rate of 80 million

fossil fuels [is] a limited resource. To put this in perspective: the Earth' crust contains 2.1 quadrillion barrels of oil. At a consumption rate of 80 million barrels per day, world-society's oil supply would last 70,000 years. In addition, oil is rechargeable: http://www.google.com/search?q=site%3Ajuliansimon.com%2Fwritings%2FUltimate_Resource+oil http://www.google.com/search?q=site%3Ajuliansimon.com%2Fwrit... contrary to common belief, category 3 resources (including oil) are all renewable.