Related by context. Frequent words. (Click for all words.) 44 Thick clouds 44 slabs 43 billowing clouds 43 vertical shafts 43 outer crust 42 steam vents 42 chimney stacks 42 chimneys 41 firebox 41 Huge plumes 41 piles 41 crater 40 billowing smoke 40 Burning fossil fuels 40 smoke 40 billowing cloud 40 combustion gases 40 Carefully remove 40 smokestacks 39 Nitrogen oxides 39 silica dust 39 smokestack 39 molten iron 39 incomplete combustion 39 blast furnaces 39 bars 39 vaporised 38 pyroclastic 38 tailing ponds 38 Sulfur dioxide 38 chimney 38 thick layer 38 lava flowing 38 salt crystals 38 pulverized concrete 38 Felled trees 37 smoke wafted 37 elevator shafts 37 molten steel 37 wisps 37 chimney stack 37 evaporation ponds 37 belching smoke 37 rockface 37 rocks 37 stacked vertically 37 walls 37 glass panes 37 ceilings 36 unburned fuel 36 towering plume 36 unburnt 36 inhaling smoke 36 Cardboard boxes 36 cumulus clouds 36 coke ovens 36 hulk 36 thick plume 36 sooty 36 gangways 36 blackened shell 36 crossbeams 36 toxic byproducts 36 smoking lounges 36 boulders 36 particulates 36 plumes 36 stalactites 36 furnaces 36 floors 36 Minntac 36 thick 36 blast furnace 35 separately ventilated 35 scaffoldings 35 slab 35 nitrous oxides 35 wooden slats 35 vats 35 mounds 35 cannisters 35 cubes 35 deadfall 35 soot particles 35 pyroclastic flow 35 atomizing 35 thick plumes 35 garbage heaps 35 clinkers 35 monoliths 35 smoky 35 Thick smoke 35 thermocol 35 reinforcing rods 35 portland cement 35 unpleasant smell 35 sky scrapers 35 eerie glow 35 decks 35 embers 35 corrugated iron roofs