Klamath Mountains animal species, including black bears, large cats, owls, eagles, and several species of Pacific salmon. Millions of acres in the mountains are managed by the United States Forest Service. The northernmost and largest sub-range of the Klamath Mountains are the Siskiyou Mountains. Physiographically, the Klamath Mountains include the Siskiyou Mountains, the Marble Mountains, the Scott Mountains, the Trinity Mountains, the Trinity Alps, the Salmon Mountains, and the northern Yolla-Bolly Mountains. They are a section of the larger Pacific Border province, which in turn is part of the Pacific Mountain System (Pacific Coast Ranges) physiographic division. These are the ten highest
Animal Liberation (book) where the benefit (in terms of improved medical treatment, etc.) outweighs the harm done to the animals used. "Animal Liberation" is one of the most widely-read books by a moral philosopher. Activist Ingrid Newkirk wrote of "Animal Liberation", "It forever changed the conversation about our treatment of animals. It made people—myself included—change what we ate, what we wore, and how we perceived animals." Other activists who claim that their attitudes to animals changed after reading the book include Peter Tatchell and Matt Ball. Singer has expressed regret that the book did not have more impact. In September 1999, he was