Portals
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Encyclopedia of Earth (EoE)A free, fully searchable collection of articles written by scholars, professionals, educators, and experts who collaborate and review each other's work.
Think Green
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Search for articles
Select "Databases" from the Library home page.
For information focused on scientific/technical/engineering aspects, and with numerous sources covered:
consider Compendex first. Abstracts/summaries. Select "Find it@GT" icon to determine if full-text available from another database.
For information that is focused on sci/tech aspects, yet with about 600 more general sources, consider Applied Science & Technology Abstracts first. Another advantage - many links to full-text.
For information geared to a general audience, consider Academic Search Complete first.
For popular magazines only, consider Readers' Guide to Periodical Literature.