Subject categories
Climate, Environment, Natural Resources & Disasters → Conservation of natural resources
Climate, Environment, Natural Resources & Disasters → Environment - Social aspects
Climate, Environment, Natural Resources & Disasters → Environmental protection
Climate, Environment, Natural Resources & Disasters → Forests and forestry - United States
Climate, Environment, Natural Resources & Disasters → Natural resources - Environmental aspects
Climate, Environment, Natural Resources & Disasters → Water conservation
Climate, Environment, Natural Resources & Disasters → Water resources development
Communications, Infrastructure, & Transport → Water resources development
Communications, Infrastructure, & Transport → Water-supply
Documentary
Documentary → Documentary films - United States
Economics, Philosophy, Politics, Religion & Sociology → Environment - Social aspects
Education, Instruction, Teaching & Schools → Research
Short films
Short films → Short films - United States