Chasing animal tracks in the melting snow, reading the history of oak tree rings and listening to the long sound of geese migrating. In this work, aldo leopold describes what he saw and heard in a humble country house far away from modern life, as well as his travel experiences all over the continental United States. In this process, we are constantly thinking about the relationship between human beings and the earth on which they live, trying to arouse people's love and respect for nature again.

In the book Yearbook of Shaxiang, the author aldo leopold created a new kind of ethics-land ethics. He believes that the new ethics requires changing two decisive concepts and norms:

1, the concept of ethical proper behavior must be extended to care about nature itself and respect all life and nature. "When a thing tends to protect the integrity, stability and beauty of biological isomorphism, it is correct; Otherwise it is wrong. "

2. Morally, we should extend the concept of "right" to the entities and processes in nature and give them the right to exist forever. To this end, he put forward the concept of "the same body of the earth". He said: "Geoethics only expands the boundaries of the same body, including land, water, plants and animals, or regards these as a complete set: the earth." Man is only a member of the same body of the earth, not the ruler of the land. We need to respect the land.