Social aspects History 100 Human-animal relationships 41 Agriculture 39 Environmental aspects 30 Economic aspects 29 Pets 27 more ... Aspect social 25 Forests and forestry 25 Moral and ethical aspects 22 Pet owners 21 Sustainable agriculture 16 Social life and customs 14 Gardens 13 Hunting 13 Behavior 12 Deforestation 12 Environmental conditions 12 Psychological aspects 12 Dogs 11 Political aspects 11 Psychology 11 Livestock 10 Animal industry 9 Animal welfare 9 Forest management 9 Forest policy 9 National parks and reserves 9 Nature conservation 9 Philosophy 9 less ...