• 2 Videos, Slides, Films

• 1 Consumption (Economics)
• 1 Ecology
• 1 Economic aspects
• 1 Economics
• 1 Effect of human beings on
• 1 Health aspects
• 1 History
• 1 Human ecology
• 1 Human influence on nature
• 1 Lifestyles
• 1 Nature
• 1 Soil conservation
• 1 Soil ecology
• 1 Soil fertility
• 1 Soils

• 1 Common Ground Media
• 1 Curtis, Jamie Lee, 1958-
• 1 Logan, William Bryant
• 1 Maltby, Clive
• 1 National Geographic Channel (Television station : Washington, D.C.)
• 1 Touch Productions
• 1 Vargas, Elizabeth
• 1 Warner Home Video (Firm)

• 2 English

• 1 United States

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