Related by context. Frequent words. (Click for all words.) 48 incinerators 47 biomass 47 nitrogen oxides 46 flue gas 46 smelting 46 wood chips 45 mercury emissions 45 nitrogen oxide emissions 45 coal fired 45 emissions 45 nitrogen oxide 44 TXI 44 boilers 44 gasification 44 furnaces 44 pollutant 43 incineration 43 fossil fuel 43 wood pellets 43 NOx 43 hazardous waste 43 biodiesel 43 volatile organic compounds 43 air pollution 43 landfills 42 Clean Air 42 smelters 42 woodchips 42 coking 42 polluting 42 sewage sludge 42 kilns 42 plastics 42 coal gasification 42 solvents 41 pollutants 41 coal 41 emission 41 pollution 41 TCEQ 41 sulfur coal 41 cogeneration 41 foundries 41 sulfur dioxide emissions 41 landfill 40 tpy 40 Emissions 40 greenhouse gases 40 gases 40 carbon dioxide emissions 40 feedstock 40 synthetic fuels 40 asphalt 40 combustion 40 recycling 39 recyclers 39 scrubber 39 AQMD 39 diesel engines 39 plants 39 greenhouse gas 39 scrubbers 39 emission reduction 39 sulfur dioxide 39 Biogas 39 feedstocks 39 ash 39 carbon emissions 39 wood stoves 39 greenhouse emissions 39 biofuel 39 GHG 39 PET bottles 39 GHG emissions 39 methanol 39 syngas 39 gypsum 38 tailpipe emissions 38 greenhouse gas emissions 38 reduce carbon emissions 38 SO2 38 recycler 38 carbon dioxide 38 greenhouse gas GHG emissions 38 Environmental Protection Agency 38 polluting industries 38 steelmaking 38 hazardous wastes 38 coal ash 38 smelter 38 Biomass 38 incinerator 38 reducing CO2 emissions 38 DEQ 38 fossil fuels 38 plant 38 hazardous chemicals 38 refrigerants 38 Recycling 38 internal combustion engines 37 emission reductions