Social aspects History 34 Environmental aspects 12 Human-animal relationships 9 Agriculture 7 National parks and reserves 6 Pets 6 more ... Economic aspects 5 Forests and forestry 5 Pet owners 5 Social life and customs 5 Environmental conditions 4 Fishing 4 Hunting 4 Livestock 4 Moral and ethical aspects 4 Sustainable agriculture 4 Agricultural biotechnology 3 Dogs 3 Forest policy 3 Gardens 3 Nature conservation 3 Psychological aspects 3 Psychology 3 Social conditions 3 African American men 2 Animal culture 2 Animal welfare 2 Behavior 2 Cats 2 less ...