Volatile organic compounds (VOCs) are an important
group of organic compounds in atmospheric chemistry. They
can be either emitted into or formed in the atmosphere.
Primary emission VOC sources include both natural (e.g.,
biomass burning) and anthropogenic (e.g., vehicular exhaust,
cooking emission, incense burning, and cigarette smoke).
Many VOCs have adverse health effects and play important
represent street-level emissions from nearby vehicle exhaust
and road dust. It is aimed to get slow traffic emission exhausts
when vehicles are idling and under slow traffic/for crossboundary
vehicles. 3) Lok Ma Chau roadside monitoring
station (LMX) is located at the entrance of the boundarycrossing
point that vehicles come from Mainland China to
Hong Kong.