49. How Much Oil Have We Used? Science Daily. 8 May 2009. (http://www.sciencedaily.com/releases/2009/05/090507072830.htm)
50. Oil Reserves. Wikipedia. (en.wikipedia.org/wiki/Oil_reserves)
51. Using the Chevy Volt for comparison, a compact car designed for efficiency, we find that a 13 kilowatt-hour charge will take the Volt about as far, depending on conditions such as ambient air temperature, as 1 gallon of gasoline will take it, according to Chevrolet's published data. (click here, en.wikipedia.org/wiki/Electric_car#Running_costs_and_maintenance)
52. Mark Modica. Chevy Volt Gas Savings: Myths and Reality. 27 February 2012. National Legal and Policy Center. (nlpc.org/stories/2012/02/24/true-gas-savings-chevy-volt)
53. One Gallon--The Achilles' Heel of Electric Cars. Red State. 19 February 2012. (click here)
54. A photovoltaic system in southern latitudes may expect to produce 1 Wh/m^2/day (en.wikipedia.org/wiki/Photovoltaic_system) and a 5 kilowatt system would require about 40 square meters of collectors (http://www.californiasolarco.com/faq.html).
55. The Cost of Generating Electricity. Royal Academy of Engineering. (click here)
56. Michael Grunwald. The Real Cost of U.S. Nuclear Power. Time. 25 March 2011. (http://www.time.com/time/magazine/article/0,9171,2059603,00.html)
57. Arne Jungjohann. Germany's Phaseout Reveals the True Costs of Nuclear Power. 30 September 2011. (grist.org/nuclear/2011-09-29-germanys-phaseout-reveals-the-true-costs-of-nuclear-power/)
58. Damian Carrington. Nuclear Power's Real Chain Reaction: Spiralling Costs. The Guardian.22 July 2011. (click here)
59. Food vs. Fuel. Wikipedia. (en.wikipedia.org/wiki/Food_vs._fuel)
60. The Ethanol Fallacy. Popular Mechanics. 18 December 2009. (click here)
61. Ask the Conservationist: January 2011: Why Does Biodiversity Matter? The Nature Conservancy. (click here)
62. What Does Biodiversity Do for Us? Bio Diversity BC. (http://www.biodiversitybc.org/EN/main/why/109.html)
63. Millennium Ecosystem Assessment. (http://www.maweb.org/en/index.aspx)
64. The Sixth Great Extinction? Biotechnology and Biological Sciences Research Council. (United Kingdom.) (click here)
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