Related by context. Frequent words. (Click for all words.) 67 polluting 59 environmentally friendly 58 environmentally sound 53 pollute 53 environmentally sensitive 51 environmentally sustainable 51 environmentally responsible 50 environmental impacts 50 wasteful 50 fossil fuels 49 fossil fuel 49 environmentally 48 harmful 48 eco friendly 47 tar sands 46 ecologically 46 expensive 45 polluted 45 reduce carbon emissions 45 incineration 44 carbon emissions 44 pollution 44 inefficient 44 greener 43 costly 43 environmentally conscious 43 toxic chemicals 42 environmental 42 CO2 emissions 42 economically viable 42 biofuels 42 carbon dioxide emissions 41 destructive 41 pollutants 41 greenhouse emissions 41 carbon 41 economical 41 toxic 40 alternative 40 carbon footprint 40 greenhouse gas emissions 40 unsustainable 40 biomass 40 carbon dioxide 40 biofuel 40 CO2 40 environmentalists 40 greenhouse gases 40 emissions 40 unsafe 40 counterproductive 40 landfills 40 carbon neutral 39 cleaner 39 toxic waste 39 polluters 39 pollutant 39 hazardous 39 counter productive 39 environmental degradation 39 impractical 39 inconvenient 39 landfill 39 sustainable 39 efficient 39 Greenpeace 38 alternatives 38 potentially harmful 38 biodegradable 38 dangerous 38 risky 38 hydraulic fracturing 38 recyclable 38 invasive 38 greenhouse gas 37 intrusive 37 Environmentalists 37 renewable 37 onerous 37 inhumane 37 noxious 37 costlier 37 eco 37 waste disposal 37 reusing 37 unethical 37 unwise 37 environmentalist 37 feasible 37 oil sands 37 ecological 36 short sighted 36 gas guzzlers 36 greenest 36 coal 36 Sustainable Development 36 sustainably 36 renewables 36 unworkable 36 waste 36 indiscriminate