This California Geological Survey site provides information about naturally occurring chrysotile and amphibole asbestos in ultramafic rocks and the possible health hazards of asbestos dust from the disturbance of rocks and soil. The site also provides links to information about the geology of asbestos occurrences in California, maps of possible sources of naturally occurring asbestos, reports, and ... 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.

This collection provides a wide array of visual resources and supporting material about the December 26, 2004 Indian Ocean Tsunami. Visualizations include simple animations, satellite photographs, Quicktime animations and tsunami models. The collection also contains visualizations related to other historical tsunamis and additional resources (beyond visualizations) about tsunamis. Resources can be ... Full description.

The Magma Foundry is dedicated to improving Earth science education at all grade levels. It designs, creates and disseminates modular, stand-alone media that can be used to construct interactive, engaging and exciting Earth science educational experiences. Instructors can use these components to enhance or expand their courses. This site features a variety of learning resources in physical geology, ... Full description.

This site provides links to USGS information about mercury sources, cycling and toxicity in the environment. The site features announcements about upcoming workshops and activities, fact sheets and reports, fish consumption advisories, and links to other programs and agencies working on the issue of mercury in the environment. Full description.

This site provides a brief overview of mercury cycling in the environment. Text is accompanied by useful diagrams that depict the health effects of mercury on the human body, the accumulation of mercury in an organism through biomagnification, and mercury cycling pathways in the environment. The site is also available as four separate PDF documents that have a more user-friendly layout. Full description.

This CDC site features links to a number of topics concerning environmental and human health. Topics include air quality, carbon monoxide, chemical agents, disasters and extreme weather, hydrocarbons, lead, radiation studies, water quality, and many more. Resources for each topic include fact sheets, reports, and links to further resources and related subject areas. Full description.

This site features an interactive map of recent earthquakes in California and Nevada, a searchable earthquake data archive, a clickable fault map of southern California, and an interactive map of historic quakes. There is also a glossary and animated block diagrams of fault movements. Full description.

This USGS portal offers information about the origin, frequency, and distribution of natural geologic hazards and catastrophic events, and the resulting impacts on people, property, and the environment. Featured sites provide user-friendly information and graphics about earthquakes, tsunamis, landslides, El Nino, hurricanes, and erosion studies. Information is available about both general topics and ... Full description.

This site features seven PBS programs from around the world that explore the delicate relationship between humans and the natural environment, and the necessity of achieving a balance between the two. Programs contain both text and video, as well as links to other information sources. In addition to the seven programs, the site also features a photo gallery, definitions and information about global ... Full description.