chimney, chimney stack, cooling tower, silo, windmill, spire, sulfur dioxide, incinerator, grain elevator, slag heap, sponge rubber, ash, sooty, plume, landfill, tower, furnaces, waterwheel, steeple, boiler, hulk, steam boiler, icicle, turbines, skyscraper, crane, soot, cupola, railyard, millrace, vapor, belching, scrubber, minaret, firebrick, dirigible, trestle bridge, derrick, ductwork, pollutant, clapboards, wind turbine, foremast, asbestos, polluter, paddlewheel, discharger, bleachery, skyline, locomotive, particulate matter, pollution, scaffoldings, creosote, buildings, smoke, spelter, steeplejack, spiers, thunderhead, coal, particulates, eyesore, obelisk, fly ash, incineration, whaleback, truss bridge, culm, flue pipe, candle flame, campanile, elevator shaft, plant, pulverizer, rimrock, hatchway, penstock, bell tower, transite, quonset, belfry, fossil fuel, gasholder, kiln, girders, gasworks, blast furnace, mercury, camphor tree, digestor, gambrel roof, wind vane, gasometer, zeppelin, billowing, airdock, airship, acid rain, air pollution, sugarhouse, transformer, smokestacks, flagpole, funnel, funnels, chimneys, lighthouse, pillars, pylons, spout, mound, mountain, podium, pylon, stacks, waterfall, boulder

funnel, sparker, spark arrester, squatty

stack