Environmentalist thought & ideology 13 Social impact of environmental issues The environment 11 Ecological science, the Biosphere 9 Conservation of the environment 4 Society & social sciences 3 Animals & nature in art (still life, landscapes & seascapes, etc) 2 Environmental economics 2 Literary reference works 2 Social issues: environment & green issues (Children's / Teenage) 2 History of science 1 Media studies 1 Regional & area planning 1 Regional geography 1 Slovenia 1