Study suggests halving Pearl River Delta traffic
September 11, 2014 Category Environment, Pollution
Reducing traffic in the Pearl River Delta by half could be one of the most effective means of combatting regional smog, according to a cross-border air pollution study. The study highlighted traffic as the major source of a smog-inducing pollutant, volatile organic compounds (VOCs), which can react with nitrogen oxides (NOx) generated from other combustion sources to form ozone. It concluded traffic-related emissions accounted for 50% of the ambient VOC levels in the region, with petrol exhausts being the biggest single contributor. This conclusion was based on modeling results. The summary of the HKD10 million study on the formation of photochemical smog in the region did not elaborate on how traffic could be halved. It was funded by Hong Kong’s Environmental Protection Department. The summary also reported that the share of industrial emissions was about 25%.
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