The Encyclopedia of Earth is a refereed wiki of all things of, and about, the Earth.
It seeks to become the world’s largest and most authoritative electronic source of information about the environments of Earth and their interactions with society.

The EoE is an Open Source project that uses a modified version of MediaWiki as its authoring platform. The EoE’s author wiki is restricted to individuals judged to be expert in their field by an editorial board, and articles are reviewed and approved by a subject specific editor prior to publication.

EOE topics range from “Atmospheric resources in Africa” to “Zagros Mountains forest steppe”, from “Acid rain” to “Zero-point energy”. There is a link to it from Princeton’s online catalog.