Scopus is a multidisciplinary database of academic literature.
Pollution Abstracts contains references to journal articles, conference proceedings, and hard-to-find documents on all aspects of pollution.
Compendex from Engineering Village is the most comprehensive engineering database, covering all disciplines. Use the FindIt button to locate the full text of the articles.
National Service Center for Environmental Publications is the premier source for EPA publications. Most pubilcations are online, but those that are available only in print may be ordered free of charge.