Every living thing affects the ecosystem as being itself. You can not live without the help of other species. If you live only in a human center with excellent brain and technology, you will end up becoming an endangered species. It is necessary to search carefully and accurately for the long-term coexistence of humans and other animals and plants and to find ways to utilize them effectively. Also, their will and participation must be gathered to bring about change. What can we do to preserve our living species?