particulate matter, particulates, sooty, smog, pollutants, ash, dust, exhaust fumes, air pollution, pollution, sulfur dioxide, emissions, nitrogen oxide, smoke, ozone, nitrogen dioxide, lampblack, gunk, carbon monoxide, sulfur, gases, fumes, cinders, carbon dioxide, acid rain, creosote, water vapor, tailpipe, smokestacks, greenhouse gas, grime, sulphates, vapor, unburnt, silt, sulfur hexafluoride, aerosols, mercury, debris, sawdust, carbon disulfide, hydrogen chloride, fluorocarbons, trichloroethane, haze, asbestos, sludge, condensation, plume, smoky, toxins, methane, guck, monoxide, sediment, sulfur oxide, carbon tetrachloride, ammonia, contaminants, mist, carcinogens, blotches, charcoal, hydrogen sulfide, methyl chloride, coal, crocidolite, particles, acrolein, grease, chimneys, formaldehyde, hydroxyl radical, powdery, coal tar, fly ash, odors, carbon, dioxides, pollen, yellow ocher, stench, hydrogen sulphide, transite, tannic acid, pentachlorophenol, sulphur dioxide, firedamp, eucalyptol, phenanthrene, snow, dampness, residue, burning, lichen, stains, baking soda, tetrachlorethylene, nitrous acid, smokey, flue pipe, albedo, dirt, ashes, mortar, mud, sand, asphalt, putty, sweat, muck, plaster, rosin, rust, brown, greasy, spilled, blacker, bottomless, coffee, ink, rain, spatter, splashed, varnish, water, black, brush, chalk, chamois

befouled, begrimed, bister, bistre, black, chimneysweep, chimneysweeper, dingy, fouled, grimy, grubby, grungy, raunchy, small-particle pollution, smut, smuttiness, sootiness, sweep

atomic number 6, c, coat, surface

carbon black