Ecology Indigenous peoples Environmental conditions 8 Social conditions 5 Social life and customs 5 History 4 Human ecology 4 Traditional ecological knowledge 4 Environmental degradation 3 Antiquities 2 Applied anthropology 2 Conservation of natural resources 2 Environmental policy 2 Ethnobotany 2 Human-animal relationships 2 Human-plant relationships 2 Indians of South America 2 Philosophy of nature 2 Politics and government 2 Rites and ceremonies 2 Social aspects 2 Social sciences 2 Agriculture 1 Akha (Southeast Asian people) 1 Animal remains (Archaeology) 1 Anthropological aspects 1 Biotechnology 1 Boundaries 1 Casas Grandes culture 1 Chaco culture 1