Environmental Science Research Guide

The National Science Digital Library provides high quality online educational resources for teaching and learning, with current emphasis on the sciences, technology, engineering, and mathematics (STEM) disciplines—both formal and informal, institutional and individual, in local, state, national, and international educational settings.
Most resources in the library adhere to principles of Open Educational Resource (OER) access.

Designed to meet the needs of the research community worldwide, this online portal offers quick and easy access to the collections of the 48 National Libraries of Europe and leading European Research Libraries.
Users can cross-search and reuse over 28,627,026 digital items and 175,511,348 bibliographic records.
To facilitate further research, links are also provided to other websites in the Europeana group.

The World Digital Library (WDL) is a project of the U.S. Library of Congress, carried out with the support of the United Nations Educational, Cultural and Scientific Organization (UNESCO), and in cooperation with libraries, archives, museums, educational institutions, and international organizations from around the world.
Books, manuscripts, maps, and other primary materials on the site are not translated but presented in their original languages. More than 100 languages are represented on the WDL, including many lesser known and endangered languages.