http://tags.library.upenn.edu/tag/encyclopedias+environment PennTags Feed http://tags.library.upenn.edu/makerecord/voyager/261 http://tags.library.upenn.edu/makerecord/voyager/261 <span>Consisting of over 1000 articles written by experts, this encyclopedia provides in-depth world wide coverage of environmental issues. Definitions of environmental terminology are included and each article has a bibliography to enable you to find further reading in your area. </span> http://tags.library.upenn.edu/makerecord/voyager/259 http://tags.library.upenn.edu/makerecord/voyager/259 <span>This is a basic but very good introductory encyclopedia. It is arranged alphabetically and entries are concise and easy to understand, its main geographic focus is the </span><span>United States</span>