This Topic in Depth explores the basics and uses of chlorine. Provided by the Environmental Protection Agency, the first site is called Chlorine Bleach (1). The page briefly describes what chlorine bleach is, what's in it, and related health and safety concerns. The next site is maintained by WebElements.com and is called Chlorine (2). Visitors learn the element's symbol, atomic weight, its uses,...

The report, "Diazinon Levels in Sacramento and San Joaquin Basin Rivers Lower Than in 1990s", was released June 20, 2002 by the US Geological Survey in cooperation with the California Department of Pesticide Regulation. The abstract can be read on this site and the entire publication can be downloaded and viewed free of charge using the available link.

Green Chemistry, as its name implies, is an environment friendly practice of using chemistry to prevent pollution. The US Environmental Protection Agency (EPA) created the Green Chemistry Expert System software that can be freely downloaded from this site. The program can be used to assess hazardous substances in chemical reactions, learn about green synthetic methods, design safer chemicals by...

The Proceedings and Summary Report entitled, "Workshop on the Fate, Transport, and Transformation of Mercury on Aquatic and Terrestrial Environments", was published and made available this month by the Environmental Protection Agencies Office of Research and Development. The purpose of the workshop was to discuss the state of the science regarding the fate and transport of mercury in aquatic and...

Tox Town, a Web-based project of the National Library of Medicine (NLM), is "an interactive guide to commonly encountered toxic substances." This highly visual Web site provides a wealth of information and related resources, such as an introduction to everyday locations where toxic chemicals might lurk, non-technical descriptions of toxins, the effect of toxins on human health, and more. Users...

The US Chemical Safety and Hazard Investigation Board began operations in 1998 with the stated mission to promote the prevention of major chemical accidents at fixed facilities. The independent, scientific investigative agency's Web site contains historical and current data, reports, and other information on chemical accidents from around the nation. For example, on September 13, 2002, a chemical...