Effect of green roof on ambient CO2concentration

Jian Feng Li, Wing Hong Onyx Wai, Yok Sheung Li, Jie Min Zhan, Y. Alexander Ho, James Li, Siu Shu Eddie Lam

Research output: Journal article publicationJournal articleAcademic researchpeer-review

162 Citations (Scopus)


Plants can improve air quality by removing pollutants. The air purification capability of plants has been receiving increasing attention because of the rapid deterioration of the environment. However, research on evaluating quantitatively the effect of plants on the environmental pollutant concentrations is still scarce. This paper studies the effect of a green roof on the ambient CO2concentration as an example to assess the benefit of urban greening. The study comprises three parts: (1) Field measurement of the difference of CO2concentration at a location in the middle of the plants in a small plot of green roof and one in the surrounding area, (2) Experiments to measure the plant's CO2absorption velocity and emission rate using a sealed glass chamber; and (3) Computer simulation of the CO2concentration distribution around a green roof using the measured CO2absorption velocity and emission rate to quantify the effects of the green roof on the ambient CO2concentration.
Original languageEnglish
Pages (from-to)2644-2651
Number of pages8
JournalBuilding and Environment
Issue number12
Publication statusPublished - 1 Dec 2010


  • Air quality
  • Chamber experiment
  • CO absorption velocity 2
  • Field measurement
  • Green roof
  • Numerical simulation

ASJC Scopus subject areas

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


Dive into the research topics of 'Effect of green roof on ambient CO2concentration'. Together they form a unique fingerprint.

Cite this