Categories
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The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Victoria (7 members)
- Vietnam (12 members)
- Virginia (23 members)
- Virtual Earth (90 members)
- Virtual Planet (98 members)
- Virtual Reality (18 members)
- Visual Pollution (7 members)
- Voting (116 members)
- Voting Rights (111 members)
- Voting Systems (105 members)
- WTO (4 members)
- WWU (5 members)
- Wales (3 members)
- Warfare and the Environment (6 members)
- Warsaw (1 member)
- Washington (182 members)
- Washington DC (6 members)
- Waste Management (5 members)
- Wastewater Treatment (13 members)
- Water (297 members)
- Water Pollution (68 members)
- Water Quality (525 members)
- Water Saving (113 members)
- Watersheds (46 members)
- West Virginia (33 members)
- Western Asia (6 members)
- Western Australia (4 members)
- Wetlands (180 members)
- Whole Earth (1,730 members)
- Wildlife (291 members)
- William and Mary (5 members)
- Wind Energy (501 members)
- Wind Power (31 members)
- Wisconsin (49 members)
- Women's Issues (33 members)
- Women's Rights (112 members)
- Women and Gender (65 members)
- Workers Rights (86 members)
- Workplace Regulations (10 members)
- World Bank (349 members)
- World Bank Group (10 members)
- World Wide Web (752 members)
- Wyoming (8 members)
- Yemen (1 member)
- Youth (795 members)
- Yukon Territory (1 member)
- Zambia (2 members)
- Zero Waste (28 members)
- Zimbabwe (3 members)
- Zoology (33 members)