Related by context. Frequent words. (Click for all words.) 73 gasoline additive MTBE 70 MTBE 69 methyl tertiary butyl ether 67 gasoline additive 58 perchlorethylene 57 suspected carcinogen 54 ethanol blended 54 reformulated gasoline 52 fuel additive 52 low sulfur diesel 52 hydrofluoric acid 52 leaded gasoline 52 cleaner burning 52 additive 50 contaminate groundwater 49 chlorofluorocarbons CFCs 49 contaminate drinking 49 chloramine 48 toxic chemicals 48 solvents 48 petroleum refiners 48 diesel fuel 47 additives 47 ULSD 47 chemical additives 47 flame retardants 47 lawn fertilizers 47 Renewable Fuels Standard 47 gasoline 47 fire retardants 46 chloramines 46 harmful chemicals 46 chlorine 46 diesel 46 caffeinated alcoholic beverages 45 ethanol 45 cooking oils 45 polychlorinated biphenyls PCBs 45 gasohol 45 atrazine 45 hexane 45 HCFCs 45 perc 45 wood preservative 45 corn ethanol 45 toxic substances 45 plasticizers 45 sodium benzoate 45 oxygenate 45 fumigant 44 #,# dioxane 44 artificial trans fats 44 chemicals 44 chlorofluorocarbons 44 pesticides 44 Atrazine 44 fumigants 44 HCFC 44 biodiesel blends 44 sulfur 44 ozone depleting substances 44 glycerin 44 biodiesel 44 refrigerants 44 Smokeless tobacco 44 cleaner fuels 44 coal tar 44 hydraulic fracturing 43 toxic pesticides 43 Endosulfan 43 benzene 43 methyl bromide 43 flavored malt beverages 43 partially hydrogenated oils 43 pesticide 43 artery clogging trans fats 43 organic solvents 43 fly ash 43 smokestack emissions 43 Solvents 43 volatile organic compounds 43 biobutanol 43 artificial trans fat 43 trans fats 43 CFCs 43 corn syrup 43 unleaded gasoline futures 42 ethanol blends 42 synthetic pesticides 42 Four Loko 42 unleaded fuel 42 naphthalene 42 glycerine 42 pollutant 42 pesticide DDT 42 wood boilers 42 phthalates 42 Benzene 42 ozone depleting 42 Renewable Fuel 42 hydrofracking