causes of climate change are strongly related to the current patterns of production and consumption of fossil fuels. The 2007 Fourth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC) highlighted that CO2 emissions increased 80% from 1970 to 2004, representing 77% of the emissions in 20041. One of the largest growth areas in greenhouse gas (GHG) emissions in this period in an assessment of end-users sectors was the transportation sector with 120%. This sector accounts for 23% of world energy-related CO2 emissions, wi