- Chemistry & Environmental Dictionary - provides definitions for technical terms and acronyms, and related articles.
- U.S. Environmental Protection Agency: National Environmental Compliance Assistance Clearinghouse - provides quick access to compliance assistance web resources from the U.S. EPA and its partners.
- ISO 14000 Environmental Management Guide - provides guidance and information for the ISO 14000 and ISO 14001 environmental management standards.
- National Geographic: Wild World - charting Earth's diverse ecoregions characterized by distinct climates and plant and animal communities. With profiles, photos, and multimedia features.
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