• 8 Videos, Slides, Films

• 8 Energy consumption
• 8 Environmental aspects
• 8 Management
• 8 Power resources
• 6 Land use
• 3 Conservation of natural resources
• 3 Pollution
• 2 Biodiversity conservation
• 2 Biotic communities
• 2 Effect of human beings on
• 2 Environmental geography
• 2 Human ecology
• 2 Human geography
• 2 Nature
• 2 Refuse and refuse disposal
• 2 Toxicology
• 2 Waste disposal
• 1 Air
• 1 Architecture, Modern
• 1 Chemical elements
• 1 Chemistry, Physical and theoretical
• 1 Climatic changes

• 8 Films Media Group
• 8 Films for the Humanities & Sciences (Firm)
• 2 National Geographic Television & Film
• 2 Video Education Australasia
• 1 Cambridge Educational (Firm)
• 1 Radio-Télévision belge de la communauté culturelle française
• 1 TVF International (Firm)
• 1 Telepool GmbH

• 8 English
• 1 Multiple languages

• 1 United States

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