• 13 Videos, Slides, Films

• 2 Human ecology
• 2 Pollution
• 1 Agricultural chemicals
• 1 Air
• 1 Atmosphere
• 1 Atmospheric temperature
• 1 Biodiversity
• 1 Biodiversity conservation
• 1 Biotic communities
• 1 Carbon dioxide mitigation
• 1 Climatic changes
• 1 Coexistence of species
• 1 Demography
• 1 Ecology
• 1 Effect of human beings on
• 1 Energy conservation
• 1 Environmental aspects
• 1 Environmental health
• 1 Environmental policy
• 1 Environmental protection
• 1 Environmental sciences
• 1 Extinction (Biology)
• 1 Fertilizers
• 1 Food supply
• 1 Fresh water

• 13 Annenberg Learner (Firm)
• 13 Harvard Environmental Economics Program
• 13 Lewicke, Anna
• 9 Griswold, Alex
• 4 Mcelheny, Tobias
• 2 Grainger, Clive A.

• 13 Earth (Planet)
• 1 El Niño Current

• 13 Educational films
• 13 Environmental films

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