air pollution, fossil fuel, emitting, toxic waste, contaminating, despoiling, greenhouse gas, carbon dioxide, nitrogen oxide, dirtying, nonpolluting, sulfur oxide, landfilling, environmentally sound, befouling, greenhouse emission, clean, decarbonizing, dumping, exhaust fumes, belching, gasifying, leaded gasoline, acid rain, hazardous waste, sulfur dioxide, sulphur dioxide, foresting, industrialized, decarbonise, gas guzzler, damming, acidifying, waste, damaging, particulate matter, mow down, guzzling, oxygenating, methyl chloride, repower, fly ash, littering, harming, spew, methylene chloride, recycle, overexploit, radioactive waste, diesel fuel, discharging, idling, electrolyze, congested, aromatic hydrocarbon, hydrofluoric acid, global warming, dredging, ruining, tree hugger, subsidizing, amur river, urbanise, liquified, carbon disulfide, silting, polychlorinated biphenyl, degrading, diesel engine, sullying, boron trifluoride, carbon tetrachloride, carbonize, internal combustion, outgas, destroying, caustic soda, stinking, soda ash, urban sprawl, greening, soil erosion, fracking, garbage dump, climate change, allyl alcohol, methyl isobutyl ketone, carbureted, desalinate, quarrying, purifying, agglomerating, overdevelop, sacrific, portland cement, drinking, sucking, indebting, chlorinated, penalizing, respiring, hydrated lime, absorbing, autonomous, capita, central, comic, dogmatic, extreme, fixed, fluorescent, gluten, hostile, ionic, natural, polar, positive, radioactive, resistence, spe, synthetic, tannin, laborintensive, automotive, capitalintensive, renewable, extractive, nonconventional, inexpensive, cheaper, mechanised, labourintensive, lowcost, mechanized, inefficient, photovoltaic, using, cleaner, enhancing, manufacturing, metallurgical

contamination, pollution