Related by context. Frequent words. (Click for all words.) 72 smokestacks 54 chimney 52 chimneys 51 cooling tower 47 cooling towers 47 silo 47 coal fired 46 windmill 45 spire 44 sulfur dioxide 43 incinerator 43 grain elevator 43 tower 42 windmills 42 plume 42 ash 42 landfill 41 boiler 41 steeple 41 furnaces 41 turbine 41 sulfur dioxide emissions 41 boilers 41 turbines 41 skyscraper 41 cupola 41 crane 40 hulk 40 vapor 40 soot 40 Bethlehem Steel 40 belching 40 scrubber 40 furnace 40 minaret 39 wrecking ball 39 ductwork 39 wind turbines 39 wind turbine 39 pollutant 39 towers 39 railroad tracks 39 particulate matter 39 pollution 38 buildings 38 smoke 38 particulates 38 creosote 38 skyline 38 asbestos 38 obelisk 38 polluter 38 spiers 38 plumes 38 locomotive 38 eyesore 38 pollutants 37 coal 37 Power Plant 37 scrubbers 37 elevator shaft 37 incineration 37 girders 37 building 37 bell tower 36 scaffolding 36 Superfund site 36 particulate 36 fossil fuel 36 air pollution 36 plant 36 mercury 36 mercury emissions 36 transformer 36 cranes 36 kiln 36 mercury pollution 36 Ferris wheel 36 emitted 36 airship 36 flue gas 36 blast furnace 35 exhaust pipe 35 billowing 35 tailpipe 35 skyscrapers 35 coal ash 35 acid rain 35 tannery 35 mushroom cloud 35 kilns 35 downwind 35 flagpole 35 ridgeline 35 steel beams 35 blast furnaces 35 smog 35 contaminated soil 35 digester 35 pilings 35 facade