Related by context. Frequent words. (Click for all words.) 56 tailpipe standards 54 Renewable Fuels Standard 52 oxygenate 50 reformulated gasoline 49 fleetwide average 47 oxygenates 47 ethanol blends 47 Renewable Fuel 46 MTBE 46 Roadless Rule 46 ethanol blended 46 RFS2 46 phaseout 46 tailpipe emissions 45 gasoline additive MTBE 44 roadless rule 44 moratorium 44 Bioterrorism Act 44 endangered species protections 44 Job Creation Act 44 categorical exclusions 44 biodiesel blends 44 liquefied coal 43 CAFE standards 43 cleaner burning 43 import tariff 43 Drevna 43 unleaded gasoline futures 43 ethanol 43 Defense Authorization Act 43 supermajority requirement 43 exhaust emission 43 regulate greenhouse gases 43 gasoline 43 mandates 43 AMT patch 42 renewable fuels 42 methyl tertiary butyl ether 42 pickups SUVs 42 retaliatory tariffs 42 gasoline additive 42 smokestack emissions 42 excise tax 42 amendment 42 corn ethanol 42 nitrogen oxide emissions 42 REAL ID Act 42 ULSD 42 requirement 41 regulating greenhouse gases 41 restriction 41 offshore drilling moratorium 41 diesel fuel 41 petroleum refiners 41 categorical exclusion 41 Deficit Reduction Act 41 embargo 41 moratoria 41 ban 41 ANWR drilling 41 import tariffs 41 Environmental Protection Agency 41 refiners 41 Waxman Markey bill 41 fumigants 41 particulate matter emissions 41 Oil Deregulation 40 EPA 40 diesel 40 gasohol 40 LCFS 40 Secure Fence Act 40 earmark moratorium 40 S.# [002] 40 procedural roadblocks 40 Reformulated gasoline 40 roadless areas 40 restrictions 40 exemption 40 Clean Air 40 PL #-# [001] 40 amendatory veto 40 Jackson Vanik amendment 40 interstate commerce clause 40 NOx emissions 40 diesel kerosene 39 prohibition 39 smog forming emissions 39 sunset clause 39 nitrous oxides 39 compressed hydrogen 39 import duties 39 import quotas 39 Emission Control 39 Dietary Supplement Health 39 MILC program 39 elective cosmetic surgery 39 requiring parental notification 39 nitrogen oxide NOx 39 low sulfur diesel 39 octane gasoline