The inspiration for the topic of smog came from a Chinese journalist-Chai Jing. In her book "Seeing", she had an in-depth investigation and understanding of the smog issue in China. Smog is also one of the inevitable major pollution problems in modern cities. In China, due to the development of industry in recent decades, many cities, including the whole world, can be said to be haze all year round. At some point, the blue sky and white clouds have become precious scenery that can be photographed and recorded. At the same time, human habit is also terrible. Living in the haze all the year round will cause the illusion that this is normal. This poster aims to give people a feeling: "It turns out that this world has become a fog and it is so unbreathable". And remind people to pay attention to smog, reduce carbon dioxide emissions, and protect the environment by depicting traffic conditions in haze days with a small view. Poster content: In the haze day, on the road, the surroundings are dim, and the car is visible, and the foggy street can be seen through the windshield. Only the flashing lights of the car can be clearly identified.