• 3 Videos, Slides, Films

• 3 Effect of environment on
• 3 Endangered ecosystems
• 3 Human ecology
• 2 Biology
• 2 Environmental degradation
• 2 Environmental quality
• 2 Environmental sciences
• 2 Life sciences
• 1 Extinction (Biology)

• 2 Films Media Group
• 2 Infobase
• 1 Attenborough, David, 1926-
• 1 BBC Studios
• 1 CNN (Firm)
• 1 Lathane, Charlotte
• 1 PBS (Firm)
• 1 Public Broadcasting Service (U.S.)

• 2 English
• 1 Unknown

• 2 Internet videos
• 1 Documentary television programs
• 1 Nature television programs
• 1 Video recordings for the hearing impaired

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