GreenFILE offers well-researched information covering all aspects of human impact to the environment, including content on global warming, green building, pollution, sustainable agriculture, renewable energy, recycling, and more. The database provides indexing and abstracts for approximately 295,000 records, as well as Open Access full text for more than 4,600 records.
Encyclopedia Britannica
Tap into the knowledge of experts from around the globe, including historians and Nobel Prize winners. Add in Britannica's in-house editorial proficiency and fact checking. Combine with the experience of curriculum specialists, educators and professional developers of innovative technology products. The result is high-quality standards-aligned, award-winning resources that make teaching and learning more effective.
  Science Reference Center Science Reference Center contains full-text for hundreds of science encyclopedias, reference books, periodicals and other sources. Subjects include biology, chemistry, earth & space science, environmental science, health & medicine, history of science, life science, physics, science & society, science as inquiry, scientists, technology and wildlife.