Related by context. Frequent words. (Click for all words.) 65 sulfur dioxide 65 mercury emissions 64 mercury pollution 62 sulfur dioxide emissions 61 carbon dioxide 61 pollutants 61 carbon dioxide emissions 61 greenhouse gases 59 SO2 58 greenhouse gasses 58 nitrogen oxide emissions 58 pollutant 58 pollution 57 emissions 57 carbon dioxide emitted 56 greenhouse gas 56 nitrogen oxide 56 carbon dioxide CO2 55 nitrogen oxides 55 air pollution 55 GHGs 55 greenhouse gas emissions 54 mercury 54 particulate emissions 54 carbon dioxide emission 54 carbon emissions 54 emission 54 toxic chemicals 54 coal fired 53 CO2 53 heat trapping gases 53 Carbon Dioxide 53 greenhouse gas GHG emissions 53 emitted 53 methane 53 particulate pollution 53 Emissions 52 greenhouse emissions 52 GHG emissions 52 CO2 emissions 52 particulate matter 52 acid rain 51 VOCs 51 Greenhouse gases 51 emission reductions 51 coal ash 51 particulates 50 CO2 emission 50 NOx emissions 50 carbon dioxide CO2 emissions 50 volatile organic compounds 49 sulfur coal 49 burning fossil fuels 49 gases 49 Carbon dioxide 49 carbon emission 49 global warming gases 49 carcinogens 49 ozone pollution 49 toxics 48 smokestacks 48 emit greenhouse gases 48 greenhouse gas emission 48 fine particulate matter 48 heat trapping greenhouse gases 48 dioxins 48 GHG 48 ozone 48 mercury contamination 47 emit 47 NOx 47 polluting 47 fossil fuel 47 emitting 47 EPA 47 harmful chemicals 47 Pollution 46 chromium 46 toxic substances 46 carbon 46 soot 46 sulfates 46 smokestack 46 ash 46 benzene 46 toxins 46 nitrogen 46 Environmental Protection Agency 46 coal 46 heat trapping 46 particulate 46 emission reduction 46 biomass 46 wastewater discharge 46 contaminant 45 tritium 45 flue gas 45 tailpipe emissions 45 Methane 45 hazardous substances 45 polluters