• 68 Videos, Slides, Films

• 68 Biotic communities
• 68 Ecological regions
• 17 Geography
• 16 Earth sciences
• 13 Geology
• 11 Natural resources
• 11 Water use
• 10 Biology
• 10 Landforms
• 10 Life sciences
• 10 Physical geography
• 8 Physical geology
• 5 Earth (Planet)
• 4 Biodiversity
• 4 Earth movements
• 4 Seismology
• 4 Surface
• 3 Botany
• 3 Endangered ecosystems
• 3 Endangered species
• 3 North America
• 3 Plants
• 2 Air

• 68 Films Media Group
• 11 BBC Worldwide Learning (Firm)
• 10 PBS (Firm)
• 9 BBC (Firm)
• 9 Camille S. DeBose (Firm)
• 3 Classroom Productions. Inc (Firm)
• 3 National Geographic Digital Media (Firm)
• 3 Video Education America (VEA) (Firm)
• 2 Cerebellum Corporation (Firm)
• 2 Green Planet Films (Firm)
• 1 A&E Networks (Firm)
• 1 ABC NEWS (Firm)
• 1 CNN (Firm)
• 1 Canadian Broadcasting Corp. (Firm)
• 1 Collective Eye Films (Firm)
• 1 Denise Richards (Firm)
• 1 Economist Group Limited (Firm)
• 1 Filmhub (Firm)
• 1 Green Interview (Firm)
• 1 Inside Science (Firm)
• 1 Kwanza (Firm)
• 1 Looking Glass International (Firm)
• 1 Mirror/Mirror Productions, Inc. (Firm)
• 1 National Geographic Society (U.S.)

• 67 English
• 1 Unknown

• 4 North America

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