A number of metals are used for industrial purposes. All exist naturally in the earth's crust, and they may contaminate air and water through a variety of means. This category varies broadly in terms of toxicity and the ability of the metals to persist in the body. More specific information on metals, including information on industrial releases, can be found in Scorecard's profiles for each metal listed below. CDC's biomonitoring results for these metals are available at http://www.cdc.gov/exposurereport/metals/default.htm

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