HEATKEYS

Toxicology, environmental health, and chemical databases and other information resources from the Toxicology and Environmental Health Information Program, National Library of Medicine, National Institutes of Health

symptom checker allowing research of the causes of one or many symptoms in an extensive knowledge base, including common and rare causes.

Fluoride Action Network is an international coalition seeking to broaden public awareness about the toxicity of fluoride compounds and the health impacts of current fluoride exposures.

Data on 6,500 pesticides, insecticides and herbicides including toxicity, water pollution, ecological toxicity, uses and regulatory status.

Alan Wood’s home page, with links to pages on pesticide common names, Unicode, HTML 4 entities, Symbol font, character sets, and Olympus close-up photography equipment.

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