Environmentalist thought & ideology 12 The environment Social impact of environmental issues 11 Ecological science, the Biosphere 9 Conservation of the environment 5 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 Interdisciplinary studies 1 Media studies 1 Natural disasters 1