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Encyclopedia of Environmental Issues
Focus on information from numerous fields of knowledge relevant to the study of environmental issues, including biology, geology, anthropology, demographics, genetics, and engineering, and explains the interrelationships of these issues in easily understood terms.

Offers authoritative full-text reference titles from Gale and other premier publishing partners. Special features include: on-demand machine-aided content translations into 14 languages and text-to-speech technology in 19 languages.  search tips

Research Areas divided into seven directorates that support science and engineering research and education.  

Search over 60 databases and over 2,200 scientific websites to provide users with access to more than 200 million pages of authoritative federal science information including research and development results.
Includes curriculum-driven resources, interactive features, and an easy to use interface for students in grades 4 through 9. Read information about science topics, watch videos, create projects, take quizzes and more. 
Full-text articles with photos, graphics and bibliographies for middle school students through college.  search tips

Designed to meet research needs of upper-elementary and middle school students. In addition to the complete World Book Encyclopedia, it also offers learning resources for educators, research tools and ideas for science projects.