The National Biological Information Infrastructure (NBII) is a broad, collaborative program to provide increased access to data and information on the nation's biological resources. NBII contains databases, teacher resources, references, information on current issues and geographically specific information pertaining to the biological sciences. Searchable databases include information on botany, fisheries, ... Full description.

This report explains how many chemicals used in pesticides, cosmetics, drugs, food, and commerce have not been sufficiently tested to allow a complete determination of their potential hazards. The report uses a model to show how research priorities for toxicity testing can be set. It may be read online, printed, or ordered in hard copy from the site. Full description.

This EPA site provides links to information about Superfund risk assessment, human health and ecological risk. These resources are intended for both professionals and community members. The site also provides a glossary of risk assessment terms for reference. Full description.

This site provides general information about selenium including its occurrence, industrial applications, toxicology, and regulations and practices regarding industrial waste disposal. The site also features links to more detailed information about each of these topics. Full description.

This site provides a comprehensive source of information about thorium. Topics include occurrence, chemical properties, current applications and economics, radiation, government regulations, and control and remediation practices. The site also features links to additional resources with more detailed information about each topic. Full description.

This site presents a three-part videotape series produced to enhance classroom discussions of the book A Civil Action. The site gives outlines of material covered by each tape and allows users to view sample video clips. The tapes are accompanied by a student course book that includes brief exercises for writing, research, class discussion and role-playing exercises, as well as audio transcripts. ... Full description.

This USGS report provides an overview of some of the common types of assessments used to determine the vulnerability of ground-water resources to contamination. Scientists can use the methods in this report to provide decision makers with information about how to best manage and protect groundwater resources. The report gives two hypothetical examples of how groundwater vulnerability assessments are ... Full description.

This is a journal article that describes the current status of five well-known earth materials that regulatory agencies, such as the EPA, have identified as significant health risks. The article includes background information and describes the risks associated with arsenic, asbestos, mercury, silica and radon. Full description.

In this curricular unit, students learn how water becomes contaminated with specific water-borne diseases, read personal accounts of unsafe water, and work together to brainstorm solutions to the water problems of communities in Africa. The website includes complete lesson plans, a list of materials, assessment tools, and links to on-line components of the exercise. Activities within this module include ... Full description.

This site from the "The On the Cutting Edge" workshop series features a wealth of ideas, teaching examples and web-based resources that are useful for teaching undergraduate hydrogeology. Full description.