Deep ecology Criticism and interpretation 1 Dissertations, Academic (Ph.D) 1 Economic development 1 Environmental aspects 1 Environmental ethics 1 Environmental responsibility 1 Environmentalism 1 Heaney, Seamus 1 Human ecology 1 Natural resources 1 Nature 1 Philosophy 1 Poetry 1 Sreedhara Menon, Vailoppilly 1 Thesis (Ph.D)-English literature 1