Human ecology 1,515 Écologie humaine 898 human ecology 600 SOCIAL SCIENCE 452 History 404 General 356 Ecology 312 Nature 308 Effect of human beings on 264 Social ecology 251 Histoire 239 Écologie sociale 237 Human Geography 236 Social aspects 231 Environmental conditions 212 Social Environment 202 Environnement 187 SCIENCE 182 Influence sur la nature 181 Religious aspects 170 NATURE 168 Philosophy 161 Êtres humains 160 Aspect social 154 Environmental aspects 137 HISTORY 127 BUSINESS & ECONOMICS 126 Aspect religieux 121 Philosophie 116 Aspect de l'environnement 99