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Information about a study conducted, which concluded that occupational exposure to chromium can cause a risk of acquiring lung cancer.

Description of ecological effects of hexavalent chromium.

Information about groups that are particularly vulnerable to hexavalent chromium.

Description of the physiological effects of hexavalent chromium.

Information about sources of hexavalent chromium exposure

Basic information about selenium.

Basic information about mercury.

Basic information about hexavalent chromium.

Information about an unfortuante accident experienced by a chemist, when conducting a test with dimethyl mercury, that caused her to pass away. 

Description of ecological effects of mercury.