Effect of human beings on Nature 16 Human ecology 8 Climatic changes 3 Effect of environment on 3 Human beings 3 Social aspects 3 Agricultural ecology 2 Environmental aspects 2 Environmental policy 2 Extinction (Biology) 2 History 2 Human-animal relationships 2 Mass extinctions 2 Moral and ethical aspects 2 Organic farming 2 Asiatic elephant 1 Biodiversity 1 Bioethics 1 Capitalism 1 Conservation biology 1 Constitutional law 1 Economic aspectst 1 Ecosystem management 1 Elephants 1 End of the world (Astronomy) 1 Endangered plants 1 Environmental conditions 1 Environmental ethics 1 Environmental law, International 1