Effect of human beings on Nature Human ecology 233 History 177 Environmental conditions 100 Ecology 84 Environmental aspects 75 more ... Social aspects 56 Environmental policy 54 Environmental degradation 53 Climatic changes 48 Global environmental change 44 Human beings 44 Effect of environment on 43 Environmentalism 38 Environmental protection 37 Philosophy 35 Landscape changes 29 Pollution 29 human ecology 24 Social conditions 23 Natural history 20 Environmental sciences 19 Human-animal relationships 19 Nature conservation 19 Environmental ethics 18 Moral and ethical aspects 17 Conservation of natural resources 16 Extinction (Biology) 16 Land use 15 less ...