Related by context. Frequent words. (Click for all words.) 75 pollute 67 pollution 67 polluted 61 polluters 60 polluter 57 pollutant 56 pollutants 54 emissions 53 emission 53 air pollution 52 toxic chemicals 51 emitting 51 fossil fuel 51 cleaner 50 toxic waste 50 dirtier 50 coal fired 49 carbon emissions 49 contaminating 49 greenhouse gases 49 carbon dioxide emissions 49 environmentally friendly 49 toxic 48 greenhouse gas emissions 48 greenhouse emissions 48 Pollution 48 dirtiest 48 CO2 emissions 47 fossil fuels 47 greenhouse gas 47 diesel 47 gas guzzling 47 carbon dioxide 46 environmentally sensitive 46 carbon 46 carbon emission 46 noxious 46 toxic substances 46 CO2 45 emission reduction 45 environmentally sound 45 harmful 45 coal 45 cleaner burning 45 reduce carbon emissions 44 gas guzzlers 44 burning fossil fuels 43 hazardous chemicals 43 clean 43 dumping 43 mercury emissions 42 tar sands 42 Emissions 42 environmentally 41 smog 41 greener 41 diesel engines 41 emit 41 GHG emissions 41 particulates 41 emitters 41 hazardous substances 41 environmentalists 41 sulfur dioxide 41 hazardous waste 41 acid rain 41 environmental 41 diesel powered 41 emission reductions 41 effluent 40 EPA 40 landfills 40 waste disposal 40 Cleaner 40 industrialized 40 phosphorous 40 volatile organic compounds 40 contaminate 40 Environmental Protection Agency 40 diesels 40 sludge 40 Clean Water Act 39 zero emission 39 landfill 39 eco friendly 39 ecologically 39 environmentally responsible 39 waterways 38 environmentally sustainable 38 incineration 38 sulfur 38 environmental degradation 38 carbon footprint 38 cleanest 38 particulate matter 38 soot 38 toxins 38 silt 38 waste 38 carcinogens 38 acidic