Appropedia uses "topics" to serve as a navigational aid, as well as way to promote awareness, discourse and content development Pages classed as "topic pages" on Appropedia are general information and wisdom on a subject, as opposed to the more specific information about particular projects, designs or organization.
Subcategories
Culture and community (40)
Design (60)
Economics (54)
Education (106)
Energy (359)
Environment (63)
Food and agriculture (232)
Health and safety (105)
Knowledge (103)
Science (67)
Taking action (6)
Technology (70)
Transport (118)
Urban planning (33)
Water (134)