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Current results range from 1994 to 2021
- Science and Technology35
- Science and technology17
- Information technology14
- Animal rights3
- Environment3
- Medical technology3
- Public safety3
- Science education3
- Biotechnology2
- Education2
- Energy Technology2
- Local government2
- Mass media--Political aspects2
- Political campaigns2
- Artists1
- Arts1
- Astronautics1
- Banks and banking1
- Biodiversity1
- Blacks1
- Business1
- Child welfare1
- Cities1
- Community development--Environmental aspects1
- Diseases1
- Ecology1
- Elections1
- Employee rights1
- Energy1
- Environmental education1
- Environmental protection1
- Ethnic groups1
- Fish trade--Environmental aspects1
- Forced migration1
- Forests and forestry1
- Geology1
- Government policy1
- Health1
- Health policy1
- Health services accessibility1
- History1
- Human rights1
- Labor1
- Labor unions--Political activity1
- Mental health1
- Museum exhibits1
- Nature conservation1
- Oil industries1
- Performing arts1
- Philately1
- Politics and government1
- Power resources--Environmental aspects1
- Protest movements1
- Public health1
- Social conditions1
- Urban policy--Environmental aspects1
- Water resources1
- Working class1
- Environment and ecology7
- Science and technology6
- Environment3
- Astronautics1
- Biodiversity1
- Community development--Environmental aspects1
- Ecology1
- Energy Technology1
- Environmental education1
- Environmental protection1
- Fish trade--Environmental aspects1
- Forests and forestry1
- Geology1
- History1
- Nature conservation1
- Power resources--Environmental aspects1
- Urban policy--Environmental aspects1
- Water resources1
- Politics and government7
- Education5
- Health5
- Agrarian and rural issues3
- Economics3
- Labor3
- History2
- Human and civil rights2
- Socioeconomic conditions and development2
- Arts and culture1
- Children and youth1
- Minorities, ethnic and racial groups1
- Urban issues1
- Brazil✖[remover]35