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This definition explains the concept of "poverty line" and provides resources for teaching it in various contexts.

Description of ecological effects of fluoride.

Information about groups that are particularly vulnerable to fluoride.

Description of the physiological effects of fluoride.

Information about sources of fluoride exposure.

Description of ecological effects of arsenic.

Information about groups that are particularly vulnerable to arsenic.

Description of the physiological effects of arsenic.

Information about sources of arsenic exposure.

Description of ecological effects of ozone.