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Hazard identification Every chemical has some intrinsic hazards; certain chemicals cause lung cancer and others cause kidney disease. Dose-response evaluation No matter how hazardous some thing is, there is no risk if there is no exposure. Risk is related to the dose-response curve. Human Exposure evaluation We need to understand level of exposure in human Risk characterization Once we have done the above three things, we have to be able to characterize the risk for policy maker and for public to make sense. |