In this project, the designer used the design skills of speculative design to cross time and space to come to the future world of vision, and designed a collar for the humans and creatures living in the Antarctic continent at that time. According to the scientific research data of scientists, in 2092, the global warming was 40 degrees, the snow water from the melting glaciers flowed into the ocean, and the sea level flooded the continents where we currently live. At this time, only the highest remaining Antarctic continent, rising temperatures and melting glaciers make it the only last dry land suitable for human habitation. Under these rapidly deteriorating living conditions, mankind has implemented a regime to coexist with the ecology. That is to equalize everyone's carbon dioxide emissions in life, and the whole meaning of life becomes guarding the ecological environment, so the numbers on people's collars become the currency of this society. However, the five stages of the numbers on this collar (blue, green, yellow, orange and red) also symbolize the different living conditions of this person. Here are stories from different people in five stages: