The mission of the Agency for Toxic Substances and Disease Registry (ATSDR), as an agency of the U.S. Department of Health and Human Services, is to serve the public by using the best science, taking responsive public health actions, and providing trusted health information to prevent harmful exposures and disease related to toxic substances.

ATSDR is directed by congressional mandate to perform specific functions concerning the effect on public health of hazardous substances in the environment. These functions include public health assessments of waste sites, health consultations concerning specific hazardous substances, health surveillance and registries, response to emergency releases of hazardous substances, applied research in support of public health assessments, information development and dissemination, and education and training concerning hazardous substances.

"An online database of animal natural history, distribution, classification, and conservation biology at the University of Michigan"

"This guide provides photographs and descriptions of biological control (or biocontrol) agents of insect, disease and weed pests in North America. It is also a tutorial on the concept and practice of biological control and integrated pest management (IPM)."

"The Carbon Dioxide Information Analysis Center (CDIAC) is the primary climate-change data and information analysis center of the U.S. Department of Energy (DOE). CDIAC is located at DOE's Oak Ridge National Laboratory (ORNL) and includes the World Data Center for Atmospheric Trace Gases. CDIAC's data holdings include records of the concentrations of carbon dioxide and other radiatively active gases in the atmosphere; the role of the terrestrial biosphere and the oceans in the biogeochemical cycles of greenhouse gases; emissions of carbon dioxide to the atmosphere; long-term climate trends; the effects of elevated carbon dioxide on vegetation; and the vulnerability of coastal areas to rising sea level."

CRS Reports (Congressional Research Service) was established to provide members, committees and congressional staff with nonpartisan and objective research and analysis on all public policy issues.  Research divisions include: American Law, Domestic Social Policy; Foreign Affairs, Defense and Trade; Government and Finance; Knowledge Services; and Resources, Science and Industry.  Many CRS reports are updated at varying intervals, so it is always important to note the exact date of issuance rather than just the title and year of publication.

Available online "This is the third edition of the most comprehensive and authoritative dictionary of ecology available. Written in a clear, accessible style, it contains over 6,250 entries on all aspects of ecology and related environmental scientific disciplines such as biogeography, genetics, soil science, geomorphology, atmospheric science, and oceanography. Coverage is wide-ranging and includes plant and animal physiology, animal behaviour, pollution, conservation, habitat management, evolution, environmental pollution, climatology and meteorology."

Available online "A Dictionary of Weather provides a comprehensive body of information about weather, forecasting, and climate terms, along with detailed illustrative examples of specific events and weather extremes. With this resource, you can easily find where and when the world's largest hailstone fell and where the highest temperature was recorded. Using the list of weather records, you can also check climate data for different weather types from around the world. Key terms from the related fields of oceanography, hydrology, and climatology are covered as are the important people in the development of meteorology. An essential dictionary for the professional and amateur meteorologist alike."

"This series shows the physical processes and human activities that shape our planet. From earthquakes and volcanoes to the creation of sea-floor crusts and shifting river courses, Earth Revealed offers stunning visuals that explain plate tectonics and other geologic concepts and principles. Follow geologists in the field as they explore the primal forces of the Earth."

"The mission of the Ecological Internet (EI) has consistently been to "empower the global movement for environmental sustainability by providing retrieval tools, portal services, expert analysis," and opportunities for "eco-action." Created and managed by Glenn Barry, a conservation biologist and political ecologist, Ecological Internet Inc. is a nonprofit organization that uses the Internet to promote and support worldwide conservation issues, ecological sustainability, and restoration.

The Ecological Internet environmental portal includes a group of separate appropriately named sites, each focusing on a different issue. They include EcoEarth.Info http://www.ecoearth.info/ (CH, Dec'06, 44-2100), Climate Ark, Forest Protection Portal http://forests.org/ (CH, Oct'08, 46-0871), Water Conserve http://www.waterconserve.org/, Rainforest Portal http://www.rainforestportal.org/, and Ocean Conserve http://www.oceanconserve.org/. My.Ecoearth.Info http://my.ecoearth.info/ enables users to have an environmental Web page in order to network with people with similar interests, launch campaigns/petitions, or write about environmental issues. Finally, Ecological Internet hosts a new "biocentric e-zine," New Earth Rising http://www.newearthrising.org/. EI is updated daily and contains archived information from 2000 forward; the site also lists current projects and campaigns. The overall layout of EI is somewhat confusing, but that is mainly because each individual site is very comprehensive and packed with information. There is a heavy reliance on color to differentiate the individual sites (which could be difficult for chromatically challenged users), and not every new screen or portal has links back to the main page. Results from searches performed using the search box on the main page are displayed on the EcoEarth.Info page; users can restrict their searches to just this site, links, news, or the entire Internet. EI provides scholarly information and will be a valuable resource for environmental academic programs, as well as an appropriate resource for students who are interested in getting involved in environmental issues." from Choice, April 2009