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Current results range from 1975 to 2020
- Environment and ecology59
- Energy Technology25
- Science and technology15
- Energy policy10
- Environmental education10
- Energy7
- Environment7
- Information technology7
- Geology5
- Natural gas5
- Power resources5
- Renewable energy resources5
- Sustainable development5
- Government policy4
- Biodiversity3
- Energy conservation3
- Environmental protection3
- Hydrocarbons3
- Industries3
- Local government --Economic aspects3
- Biotechnology2
- Community development2
- Community development--Environmental aspects2
- Community organization2
- Forests and forestry2
- Natural disasters2
- Natural resources2
- Petroleum industry and trade2
- Power resources--Environmental aspects2
- Protest movements2
- Rural development projects2
- Technical assistance2
- Water resources2
- Water use2
- Advertising1
- Agriculture1
- Animal culture1
- Astronautics1
- Conservation of natural resources1
- Democracy1
- Ecology1
- Economic development projects1
- Economic policy1
- Education1
- Education, Higher1
- Education--Study and teaching1
- Engineering1
- Environmental health1
- Fish trade--Environmental aspects1
- Health facilities1
- Health--Environmental aspects1
- History1
- Indigenous women1
- Industrial accidents1
- Industrialization1
- Industries and industrial policy1
- Infrastructure (Economics)1
- Laws1
- Local government1
- Nature conservation1
- Nuclear technology1
- Oil industries1
- Older people1
- Political participation1
- Pollution1
- Public safety1
- Small business1
- Social justice1
- Social policy1
- Sustainable agriculture1
- Traditional farming1
- Universities and colleges1
- Urban policy--Environmental aspects1
- Urban transportation1
- Vocational education1
- Work environment1
- Science and Technology59
- Energy Technology25
- Science and technology15
- Energy policy10
- Environmental education10
- Energy7
- Environment7
- Information technology7
- Geology5
- Natural gas5
- Power resources5
- Renewable energy resources5
- Sustainable development5
- Government policy4
- Biodiversity3
- Energy conservation3
- Environmental protection3
- Hydrocarbons3
- Industries3
- Local government --Economic aspects3
- Biotechnology2
- Community development2
- Community development--Environmental aspects2
- Community organization2
- Forests and forestry2
- Natural disasters2
- Natural resources2
- Petroleum industry and trade2
- Power resources--Environmental aspects2
- Protest movements2
- Rural development projects2
- Technical assistance2
- Water resources2
- Water use2
- Advertising1
- Agriculture1
- Animal culture1
- Astronautics1
- Conservation of natural resources1
- Democracy1
- Ecology1
- Economic development projects1
- Economic policy1
- Education1
- Education, Higher1
- Education--Study and teaching1
- Engineering1
- Environmental health1
- Fish trade--Environmental aspects1
- Health facilities1
- Health--Environmental aspects1
- History1
- Indigenous women1
- Industrial accidents1
- Industrialization1
- Industries and industrial policy1
- Infrastructure (Economics)1
- Laws1
- Local government1
- Nature conservation1
- Nuclear technology1
- Oil industries1
- Older people1
- Political participation1
- Pollution1
- Public safety1
- Small business1
- Social justice1
- Social policy1
- Sustainable agriculture1
- Traditional farming1
- Universities and colleges1
- Urban policy--Environmental aspects1
- Urban transportation1
- Vocational education1
- Work environment1
- Socioeconomic conditions and development14
- Energy Technology7
- Information technology5
- Power resources5
- Hydrocarbons3
- Renewable energy resources3
- Sustainable development3
- Community development2
- Natural gas2
- Technical assistance2
- Agriculture1
- Biodiversity1
- Community development--Environmental aspects1
- Community organization1
- Democracy1
- Economic development projects1
- Energy1
- Energy policy1
- Engineering1
- Environment1
- Government policy1
- Health--Environmental aspects1
- Indigenous women1
- Industrial accidents1
- Industrialization1
- Industries and industrial policy1
- Infrastructure (Economics)1
- Local government1
- Natural disasters1
- Political participation1
- Pollution1
- Public safety1
- Rural development projects1
- Science and technology1
- Small business1
- Social justice1
- Social policy1
- Sustainable agriculture1
- Traditional farming1
- Universities and colleges1
- Work environment1
- Politics and government9
- Energy Technology4
- Energy policy4
- Government policy4
- Information technology3
- Community organization2
- Local government --Economic aspects2
- Protest movements2
- Community development1
- Democracy1
- Energy1
- Environment1
- Environmental health1
- Environmental protection1
- Health facilities1
- Hydrocarbons1
- Laws1
- Local government1
- Natural gas1
- Nuclear technology1
- Political participation1
- Power resources--Environmental aspects1
- Social justice1
- Sustainable development1
- Economics7
- Agrarian and rural issues4
- Information technology2
- Rural development projects2
- Agriculture1
- Biodiversity1
- Community development1
- Economic development projects1
- Energy1
- Energy Technology1
- Indigenous women1
- Power resources1
- Renewable energy resources1
- Science and technology1
- Social policy1
- Sustainable agriculture1
- Sustainable development1
- Traditional farming1
- Water resources1
- Education4
- Science and technology2
- Community development--Environmental aspects1
- Conservation of natural resources1
- Education1
- Education, Higher1
- Education--Study and teaching1
- Energy1
- Energy Technology1
- Environmental education1
- Environmental protection1
- Natural gas1
- Petroleum industry and trade1
- Power resources1
- Universities and colleges1
- Vocational education1
- Health3
- Gender and sexuality1
- History1
- Labor1
- Urban issues1