green vehicle methods Green tuning Michelin Green X Challenge Government incentives for plug-in electric vehicles Hybrid taxis Union of Concerned Scientists' Hybrid Scorecard Low-carbon fuel standard Miles per gallon gasoline equivalent Motorised quadricycle Plug-in electric vehicles Progressive Insurance Automotive X Prize Zero-emissions vehicle Notes and references Further reading DFE2008 Automobile Engines, Wikiversity External links 2013 VehicleTechnologies Market Report, Oak Ridge National Laboratory Alternative Fuels and Advanced Vehicle Data Center AU Green Vehicle Guide Clean Car Calculator (Institute for Energy Efficiency) Clean Cities - 2014 Vehicle Buyer's Guide, National Renewable Energy Laboratory (NREL), U.S. Department of Energy, Clean Cities program. December 2013. Cradle-to-Grave Lifecycle Analysis of U.S. Light-Duty Vehicle-Fuel Pathways: A Greenhouse Gas Emissions and Economic Assessment of Current (2015) and Future (2025-2030) Technologies (includes estimated cost of avoided GHG emissions from different AFV technologies), Argonne National Laboratory, June 2016. Earth cars EPA Green Vehicle Guide Green Cars (Autocar) Green Car Center (Yahoo) Green Car Guide . Infographic: Green Cars 101 (2011) Green cars and eco driving Green Progress Model Year 2014 Fuel Economy Guide , U.S. Environmental Protection Agency and U.S. Department of Energy, April 2014. Progressive Insurance Automotive X PRIZE homepage Small Efficient Vehicles Wiki: People's Car Project State of Charge: Electric Vehicles’ Global Warming Emissions and Fuel-Cost Savings across the United States (UCS) Top Ten EPA-Rated Fuel Sippers (2016) - including BEVs and PHEVs UCS Hybrid Scorecard (Union of Concerned Scientists)