Development studies 13 Development economics & emerging economies 9 Central government policies 7 International relations 7 Politics & government 5 Environmental management 4 Environmental policy & protocols 4 Society & social sciences 4 Sociology 4 Applied ecology 3 Human geography 3 Human rights 3 Climate change 2 Economics 2 Environmental science, engineering & technology 2 Food & beverage technology 2 Gender studies, gender groups 2 International law 2 Modern history to 20th century: c 1700 to c 1900 2 Non-governmental organizations (NGOs) 2 Political economy 2 Political science & theory 2 Research methods: general 2 Social research & statistics 2 Sustainability 2 The environment 2 Treaties & other sources of international law 2 Adult education, continuous learning 1 Age groups: children 1 Agricultural science 1