Influence on nature Man 119 Pollution 31 Ecology 27 Human ecology 26 Environmental protection 21 Environmental policy 14 more ... Environmental aspects 12 Congresses 10 Periodicals 8 Climatic changes 7 Influence of environment 7 Environmental sciences 6 Addresses, essays, lectures 5 Conservation of natural resources 5 Environmental engineering 5 Environmental health 5 Rain forest ecology 5 History 4 Natural resources 4 Deforestation 3 Geomorphology 3 Industry 3 Philosophy 3 Rain forest conservation 3 Rain forests 3 Agricultural ecology 2 Bibliography 2 Biogeochemical cycles 2 Dictionaries 2 less ...