Effect of human beings on Nature 131 Human ecology 43 Environmental aspects 25 Human beings 19 Effect of environment on 18 Environmental sciences 15 History 15 Pollution 15 Climatic changes 13 Global environmental change 13 Ecology 12 Sustainable development 12 Environmental degradation 9 Environmental policy 8 Social aspects 8 Environmental protection 7 Biotic communities 6 Environmental conditions 6 Environmentalism 5 Economic aspects 4 Environmental impact analysis 4 Environmental management 4 Environmental responsibility 4 Environmental toxicology 4 Global warming 4 Philosophy 4 Textbooks 4 Consumption (Economics) 3 Environmental ethics 3