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Home > What We Do > Air > Roadside Air Pollution

Objective and Background

Hong Kong’s roadside pollution levels in 2011 were the worst ever according to the Environmental Protection Department. Pollutants that are harmful to our health include Sulfur dioxide, nitrogen dioxide and suspended particulates like PM2.5 (particulate matter with a diameter of 2.5 micrometer or less). The need for change is even clearer now that the World Health Organization (WHO) has categorized diesel exhaust fumes carcinogenic in June 2012.



  • Keep your car properly tuned up, keep the tires inflated, and don’t have the vehicle on if it isn’t being used;


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  • Phasing out of polluting diesel vehicles (e.g. pre-Euro, Euro I and Euro II) with cleaner fuel and energy efficient vehicles.


  • Replace pre-Euro to Euro III buses with Euro IV buses or higher.


  • Advocate setting up low emission zone in busy districts.



  • In 2011 an anti idling engine law was finally passed and the general awareness of the public improved.


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