• 19 Videos, Slides, Films

• 18 Study and teaching
• 13 Effect of environment on
• 13 Human beings
• 3 Conservation of natural resources
• 3 Energy consumption
• 3 Energy development
• 3 Management
• 3 Natural resources
• 3 Power resources
• 2 Economic aspects
• 2 Environmental protection
• 2 Land use
• 2 Research
• 2 Water
• 1 Agriculture
• 1 Air
• 1 Biology
• 1 Biosphere
• 1 Climatic changes
• 1 Diagnostic microbiology
• 1 Ecosystem management
• 1 Effect of human beings on
• 1 Environmental geography

• 19 Films Media Group
• 13 Annenberg Learner (Firm)
• 6 Films for the Humanities & Sciences (Firm)
• 2 Video Education Australasia
• 1 Cambridge Educational (Firm)
• 1 Galloping Pictures
• 1 MacNeil/Lehrer Productions
• 1 TV 2 (Denmark)

• 19 English

• 13 Earth (Planet)

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