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Identifying hazards, evaluating the nature and severity of risks (risk assessment), using this and other information to determine options and make decisions about reducing or eliminating risks (risk management), and communicating information about risks to decision makers and the public (risk communication).
Probability that something undesirable will result from deliberate or accidental exposure to a hazard. See risk analysis, risk assessment, risk-benefit analysis, risk management.
Amount of health damage caused by exposure to a certain dose of a harmful substance or form of radiation. See dose, dose-response curve, median lethal dose.
Mathematical statement about how likely it is that something will happen.
When there is scientific uncertainty about potentially serious harm from chemicals or technologies, decision makers should act to prevent harm to humans and the environment. See pollution prevention.
See parts per trillion.
See parts per million.
See parts per billion.
Device or process that (1) prevents a potential pollutant from forming or entering the environment or (2) sharply reduces the amount entering the environment. Compare pollution cleanup.
Chemical that in one dose kills exactly 50% of the animals (usually rats and mice) in a test population (usually 60 to 200 animals) within a 14-day period. See median lethal dose.
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