1. Bell ML, Davis DL, Cifuentes LA, Krupnick AJ, Morgenstern RD, Thurston GD (2008) Ancillary human health benefits of improved air quality resulting from climate change mitigation. Environ Health 7:41
2. Boden TA, Marland G, Andres RJ (2011) Global, regional, and national fossil-fuel CO2 emissions. Carbon dioxide information analysis center, Oak Ridge National Laboratory, U.S. Department of Energy, Oak Ridge, Tenn., U.S.A. doi: 10.3334/CDIAC/00001_V2011
3. CDOT (California Department of Transportation) (2005) Executive Order S-3-05 by the Governor of the State of California, Available online: http://www.dot.ca.gov/hq/energy/ExecOrderS-3-05.htm [Accessed March 14, 2013].
4. DOE (Department of Energy) (2006) Roadmap and technical white papers, 21st century truck partnership, office of energy efficiency and renewable energy, 21CTP-0003. Available online: http://www1.eere.energy.gov/vehiclesandfuels/pdfs/program/21ctp_roadmap_2007.pdf [Accessed March 8, 2013]
5. Duke R, Lashof D, Dornbos B, Bryk D, Greene N, Hwang R, Lovaas D, Mugica Y, Spencer T, Steelman J, Tonachel L (2008) The new energy economy: putting america on the path to solving global warming, natural resources defense council issues paper. Available online: http://www.nrdc.org/globalWarming/energy/eeconomy.pdf [Accessed March 8, 2013]