Related by context. Frequent words. (Click for all words.) 72 smokestack 52 pollutants 48 pollution 47 cooling towers 46 soot 45 skyline 45 chimneys 44 sulfur dioxide 44 nitrogen oxide 44 particulate matter 44 coal fired 44 air pollution 44 skyscrapers 43 particulates 43 pollutant 43 spiers 43 diesel exhaust 43 emissions 43 mercury pollution 42 windmills 41 plumes 41 mercury emissions 41 Manhattan skyline 40 turbines 40 polluting 40 smog 40 acid rain 40 Emissions 40 belching 40 polluted 40 emitted 40 exhaust fumes 39 grain elevators 39 toxic chemicals 39 greenhouse gas 39 blast furnaces 39 plume 38 steel mills 38 toxics 38 carbon dioxide 38 polluters 38 greenhouse gases 38 rusting 38 toxins 38 pollute 38 scrubbers 38 nitrogen oxides 37 downwind 37 emission 37 carbon dioxide emissions 37 riverfront 37 furnaces 37 eyesores 37 polluter 37 wind turbines 37 sludge 37 decaying 37 gases 37 Bethlehem Steel 37 steel mill 36 Clean Air 36 Carbon dioxide 36 cityscape 36 hulk 36 railroad tracks 36 cornfields 36 cooling tower 36 factories 36 billowing 36 tailpipe 36 Pollution 36 noxious 36 ash 36 towers 36 PCBs 35 water vapor 35 grimy 35 tailpipe emissions 35 greenhouse gasses 35 girders 35 burning fossil fuels 35 clouds 35 textile mills 35 mercury 35 particulate 35 CO2 35 gleaming 35 cathedrals 34 storage tanks 34 carbon dioxide CO2 34 cigarette smoke 34 incinerators 34 shimmering 34 pollutes 34 emitting 34 spire 34 towering 34 downriver 34 silo 34 eyesore 34 silvery