The health risk reduction of PM2.5 via a green curtain system in Taiwan

Yi Hsing Chang, Ting Hsuan Chen, Hsin Ying Chung, Hsi Yu Hsiao, Pin Chieh Tseng, Yu Chun Wang, Shih Chun Candice Lung, Huey Jen Su, Yaw Shyan Tsay

Research output: Contribution to journalArticlepeer-review


Green infrastructure can release oxygen, and capture particulate matter (PM), which can improve urban air quality and heat islands. This study aims to develop a green curtain to reduce PM2.5 through three-dimensional greening with a low preparation cost, low maintenance cost, high efficiency, and readily replaceable types. In this study, a green curtain system (GCS) was installed on a balcony with three plants, Chlorophytum comosum, Nephrolepis exaltata, and Nephrolepis pendula (Raddi) J. Sm, Another balcony without GCS was used as a control group for the study. The experiment demonstrated the efficacy of Greening Curtain Systems (GCS) on balconies in reducing PM2.5 exceedance time, particularly with 60 pots containing a mix of three plants, where Chlorophytum comosum showed notable effectiveness as a single protective plant. Leaf capture efficiency remained relatively unchanged even after 17 days without washing, attributed to the humidity of winter evenings and the evapotranspiration effect of the plants. Additionally, a health risk assessment, employing an attributable risk approach, was conducted to validate the effectiveness of PM protection measures in lowering occupants' health risks. Utilizing data on the correlation between all-cause mortality risk in individuals aged 65 and above and considering the delayed impact of atmospheric factors on human health, we employed a delayed nonlinear model to explore the exposure-response relationship. The results revealed that GCS successfully reduced the duration of high PM2.5 concentration during air pollution episodes by 15–18 μg/m3, thereby mitigating potential health risks associated with successive air pollution episodes.

Original languageEnglish
Article number111459
JournalBuilding and Environment
Publication statusPublished - 2024 May 1

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Civil and Structural Engineering
  • Geography, Planning and Development
  • Building and Construction


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