Sociology 11 Politics & government 10 Climate change 8 Research & information: general 8 Education 7 Environmental economics 7 Media studies 7 Urban & municipal planning 7 Archaeology 6 History 6 History of engineering & technology 6 Human geography 6 Social & cultural anthropology, ethnography 6 Technology: general issues 6 Central government policies 5 Economics 5 Environmental science, engineering & technology 5 Religion: general 5 Sustainability 5 The environment 5 Applied ecology 4 Biology, life sciences 4 Development studies 4 Earth sciences, geography, environment, planning 4 Ecological science, the Biosphere 4 Economic growth 4 Environmental management 4 European history 4 Gender studies, gender groups 4 History of the Americas 4