Particulate matter is solid and liquid particles suspended in the air which can be the source of air pollution. Analysis of this matter shows that many particles are from human behavior. Various particles would combine or react with each other and form new ones before having an impact again in daily life. This procedure exactly represents many issues regarding the environment and lifestyles. In this series, the collages of many smoky images and different places imply the risks hidden in life and the reflection on them, as well as the politics and power structure behind the air pollution and environmental problems.