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GreenFILE offers well-researched information covering all aspects of human impact to the environment. Its collection of scholarly, government and general-interest titles includes content on global warming, green building, pollution, sustainable agriculture, renewable energy, recycling, and more. This database is updated daily on EBSCO host.
Offers students and researchers a comprehensive look at general science by accessing diagrams, definitions, biographies of key scientists, and a fully hyperlinked timeline. Available from Facts on File.
Free Science Resources
How Many?
http://www.unc.edu/~rowlett/units/index.html
A great dictionary of units of measurement, including both descriptions and equivalents.
How Stuff Works
http://www.howstuffworks.com
How Stuff Works is the place to go to learn about how things work in the world around you. Have you ever wondered how the engine in your car works or what makes the inside of your refrigerator cold? Hundreds of articles, with new topics added each week.
Threatened Species
http://www.panda.org/about_wwf/what_we_do/species/index.cfm
This site from the World Wildlife Fund provides information on a selection of threatened and endangered species, as well as a bibliography of related reading references.
Science.gov
http://www.science.gov
“Science.gov is a gateway to authoritative selected science information provided by U.S. Government agencies, including research and development results.” Over 1,000 annotated sites are included. Use the browsable index for a broad range of topics from Agriculture and Food to Science Education. Searchable by keyword. From the science.gov Alliance, a group of U.S. government science agencies.