As part of its mission to protect human life and the environment, EPA conducts research to characterize, predict and diagnose human and ecosystem exposure to harmful pollutants and other conditions in the air, water, soil, dust and food. The National Exposure Research Laboratory and other agency bodies provide exposure information for chemicals, biologicals, radiation, and changes in climate, land and water use. EPA's Integrated Risk Information System (IRIS), summarizes available toxicity data and contains EPA's assessment of the ways in which the general public may be exposed to individual chemicals. Additionally, EPA develops and field tests new technologies for assessing and modeling exposure patterns, concentrations and scenarios, including short and long-term effects and the potential for exposure across great distances.
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