• 6 Videos, Slides, Films

• 5 DVDs

• 2 Pollution
• 2 Water
• 2 Water-supply
• 1 Balog, James
• 1 Chronophotography
• 1 Clearwater (Sloop)
• 1 Climatic changes
• 1 Cofán Indians
• 1 Conservation of natural resources
• 1 Description and travel
• 1 Effect of water levels on
• 1 Effect of water quality on
• 1 Endangered ecosystems
• 1 Environmental aspects
• 1 Environmental justice
• 1 Environmental protection
• 1 Extreme Ice Survey
• 1 Fair trade associations
• 1 Fish kills
• 1 Fishes
• 1 Fishing
• 1 Glaciers
• 1 Global warming
• 1 Government policy

• 3 Bullfrog Films
• 1 Aronson, Jerry
• 1 Balog, James
• 1 Bell, Joshua, 1967-
• 1 Big Picture Media Corporation
• 1 Bolado, Carlos
• 1 Box, Jason Eric
• 1 CanWest Global Communications Corp
• 1 Cinedigm (Firm)
• 1 Coombe, Davis
• 1 Cornfield, David J.
• 1 Cornfield, Linda A.
• 1 Corporation for Public Broadcasting
• 1 Diamond Docs (Firm)
• 1 Docurama (Firm)
• 1 Downie, Gordon, 1964-2017
• 1 DuPré Pesmen, Paulaa
• 1 Exposure (Firm)
• 1 Fogel, Anson
• 1 Forge Motion Pictures (Firm)
• 1 Hedge, Christopher
• 1 Independent Television Service
• 1 Johansson, Scarlett, 1984-
• 1 Kohler, Jack
• 1 Kunhardt Productions

• 6 English
• 1 South American Indian (Other)
• 1 Spanish

• 1 Amazon River Region
• 1 Colorado River
• 1 Colorado River (Colo.-Mexico)
• 1 Colorado River Watershed
• 1 Colorado River Watershed (Colo.-Mexico)
• 1 Ecuador
• 1 Great Lakes (North America)
• 1 Hudson River (N.Y. and N.J.)
• 1 Iceland
• 1 Klamath Basin (Or.)
• 1 Klamath River (Or. and Calif.)
• 1 Klamath River Valley (Or. and Calif.)
• 1 North America
• 1 Sólheimajökull
• 1 Sólheimajökull (Iceland)
• 1 West (U.S.)

Limit year range