air pollution, pollution, ozone, particulate matter, soot, haze, pollutant, particulates, nitrogen dioxide, nitrogen oxide, exhaust fumes, sulfur dioxide, acid rain, emission, greenhouse gas, carbon monoxide, tailpipe, humidity, mugginess, monoxide, mercury, sooty, dust, fogs, congestion, fumes, lampblack, antipollution, swelters, smoke, sulfur hexafluoride, polluters, dioxides, carbon dioxide, heatwave, benzene, greenhouse emission, smokestacks, respiratory illness, global warming, asthma, gridlock, ash, pollen, formaldehyde, hydrogen sulfide, sulfur oxide, asthmatics, urban sprawl, grayness, temperatures, idling, air, gases, ragweed pollen, hydrogen sulphide, chlorofluorocarbon, odours, stench, freeways, aerosols, smokey, smoky, thunderhead, odors, radon, skies, atmospheric, sulfur, water vapor, mist, toxins, vapors, toxaphene, noise, carbon disulfide, nitrobenzene, sprawl, mustiness, hay fever, halitosis, leaded gasoline, carcinogens, frost, dustiness, pesticide, sunscald, snow, megalopolis, sandstorm, gunk, brownout, ragweed, fumigants, fluorocarbons, ultraviolet radiation, contaminant, snowfall, allergens, belch, methane, dioxin, fog, fuzz, miasma, vapor, vapour, vapours, cloud, froth, flak, goo, grime, scum, blight, carpeting, symptom, cancer, capacity, collecting, conflict, fume, gas, inflation, picking, port, problem, runoff, transportable, use, wafer, access, aircraft, airless, alone

black pine, dicey, japanese black pine, pinus thunbergii

air pollution

smogginess