persistence - how long it stays in an environment, toxicity - how deadly a substance is, specificity - how many organisms it affects, deoxygenation - removing oxygen from water, biodegradability - how easily a pollutant is broken down by living organisms, mobility - how easily pollutants spread through the environment, solubility - how easily a substance dissolves, bioaccumulation - how easily pollutants are stored in living tissue, biomagnification - the concentration of pollutants along a food chain, synergism - the enhanced interaction of two or more pollutants, mutagen - a chemical which alters DNA, carcinogen - a chemical which causes cancer, teratogen - a substances that causes birth defects,

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