Related by context. Frequent words. (Click for all words.) 65 CAFE 58 tailpipe emissions 52 renewable fuels 51 mpg 50 alternative fuels 50 greenhouse emissions 50 emissions 50 carbon dioxide emissions 49 automakers 49 greenhouse gas emissions 48 carbon emissions 48 CO2 emissions 47 CARB 47 ethanol 47 greenhouse gas emission 47 diesels 46 Automakers 46 greenhouse gases 46 GHG emissions 45 greenhouse gas 45 carmakers 45 gas guzzlers 44 Dingell 44 gas guzzling 44 mileage 44 reduce carbon emissions 44 emission reduction 44 NHTSA 44 Clean Air 44 EVs 43 flex fuel 43 emission reductions 43 GHG 43 reducing carbon emissions 43 Automobile Manufacturers 43 global warming 43 internal combustion engine 43 EPA 43 excise tax 43 SUVs 42 emission 42 ObamaCare 42 rulemaking 42 diesel 42 fossil fuels 41 Fairness Doctrine 41 Obamacare 41 Clunkers 41 carbon emission 41 Emissions 41 NCLB 41 diesel engines 41 windfall profits 41 biofuels 40 offshore drilling 40 CO2 40 fossil fuel 40 biodiesel 40 Chevy Volt 40 hybrids 40 ANWR 40 internal combustion engines 40 FASB 40 mercury emissions 40 mandates 39 single payer 39 Mulally 39 congestion pricing 39 gasoline 39 General Motors Corp. 39 Clunkers program 38 biofuel 38 UAW 38 Dodd Frank 38 clunkers 38 Global Warming 38 FMCSA 38 FOIA 38 zero emission 38 renewables 38 gallon 38 diesel powered 38 heat trapping gases 38 tort reform 38 excise taxes 38 regs 38 Inhofe 38 diesel engine 38 Sarbanes Oxley 37 net neutrality 37 GSEs 37 cloture 37 TARP 37 Volt 37 CEO Rick Wagoner 37 Concerned Scientists 37 START treaty 37 reduce greenhouse gas 37 Oberstar 37 General Motors 37 CEO Alan Mulally