Related by context. Frequent words. (Click for all words.) 66 chimney stacks 62 chimney stack 55 #ft tall [001] 55 smokestack 53 cooling towers 51 #ft #m [002] 51 Trawsfynydd 51 gasworks 50 Ferrybridge 50 chimney 49 rooves 49 coke ovens 48 electrostatic precipitators 47 #ft [003] 47 opencast mine 47 Longannet 47 chimneys 47 corrugated iron roof 47 steam boiler 47 Saltend 47 Aberthaw 46 condensing boiler 46 Leith Docks 46 furnace 46 boilers 46 thermal oxidizer 46 combustion gases 46 telegraph pole 46 boiler 46 electricity pylons 45 pithead 45 Great Blakenham 45 watermill 45 smokestacks 45 Propane tanks 45 extractor fan 45 limescale 45 Torness 45 Sulfur dioxide 45 furnaces 45 condensing boilers 45 incinerator 45 turbine 45 disused quarry 44 railway sleepers 44 wool insulation 44 biomass combustion 44 stone hearth 44 steam boilers 44 slag heaps 44 Maghtab 44 Asbestos fibers 44 scaffoldings 44 Contaminated soil 44 patio heater 44 steam turbine generators 44 disused 44 belching smoke 44 flue gases 44 No.4 reactor 44 #ft tall [002] 44 dumper truck 44 ironworks 44 sludges 44 acetylene cylinders 44 Brayton Point 43 Union Carbide factory 43 steelworks 43 woodburner 43 Kilns 43 pipework 43 Elmswell 43 #ft #.#m [003] 43 #ft [002] 43 hobs 43 regenerator 43 #oC [001] 43 turbines 43 Delimara 43 CO ² 43 vaporise 43 brickworks 43 steeplejack 43 #cm diameter 43 cooling tower 43 sinter plant 43 noxious gases 43 Kirksanton 42 Mynydd 42 Poolbeg 42 iron smelting 42 mechanical digger 42 railway sidings 42 offshore windfarms 42 oak beams 42 #m #ft [003] 42 Burning fossil fuels 42 #.#kW [002] 42 desulphurisation 42 #.#mx #.#m [001] 42 sulfur dioxide