Scopus is a navigation tool covering the world's largest collection of abstracts, references and indexes of scientific, technical, and medical (STM) literature. Seamless links to full-text articles and other library resources make Scopus quick, easy, and comprehensive.
Is the online version of the American Geological Institute's geoscience database containing over 1.9 million records of North America since 1785, and other areas of the world since 1933. The database is the equivalent of four major reference publications: Bibliography of North Amercian Geology, Bibliography and Index of Geology Exclusive of North America, Geophysical Abstracts, and the Bibliography and Index of Geology. Additional items come from special bibliographies produced on request for state surveys or societies, and annual subject and author indexes.
"A freely accessible research database focusing on the relationship between human beings and the environment, with well-researched but accessible information on topics ranging from global warming to recycling to alternate fuel sources and beyond."