greenhouse effect, global warming, natural habitat, car exhausts, viable solutions, hazardous conditions, exhaust fumes, dwindle resources, emission laws, contamination, extinct species, dump sewage, dispose of waste, depletion, acidic conditions, garbage disposal, release pollution, sewage sludge, spillage, oil slick, leakage, tackle the problem, chemacal fertilizer, poisonous fume, breach safety levels,

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