With the development of modern cities, the number of buildings in urban areas continues to increase. Indoor environments have become isolated from outdoor plant communities, and plant communities are rarely found indoors. However, plant communities share an inseparable relationship with human health, manifesting in multiple physical and mental aspects. Photo taken in Shenzhen, China Plant communities - Natural systems for air purification Photo taken in Shenzhen, China Plants

Random noise in which all frequencies possess the same energy density is white noise. Specifically, white noise is a monotonous, continuous, full-spectrum humming sound. Due to its uniform frequency distribution characteristics, white noise can mask abrupt noise disturbances in the environment, creating a quieter environment conducive to relaxation. Photo taken in Huangshan, China Natural sounds such as rain, flowing water, and birdsong are the closest real-world approximati

When we remain for extended periods in crowded meeting rooms, enclosed classrooms, or poorly ventilated buildings, we often experience dizziness, difficulty concentrating, and even chest tightness and shortness of breath. Most people attribute these symptoms to "hypoxia" (oxygen deficiency). However, modern medicine indicates that the true culprit is often the quietly rising concentration of carbon dioxide CO₂ in the indoor air. Photo credit: unsplash An issue that cannot be