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The Environment

Ozone Layer Protection

The Montreal Protocol for controlling substances that deplete the ozone layer applies to Hong Kong. The Ozone Layer Protection Ordinance prohibits the manufacture of these substances and their import for local consumption. The import of hydrochlorofluorocarbons for local consumption has been banned since 1 January, except a small amount permitted for servicing of refrigeration and air-conditioning equipment up to 2029.

Non-road Mobile Machinery

Non-road mobile machinery newly supplied for use in Hong Kong are required to meet statutory emission requirements, namely the Euro Stage IIIA emission standard for machines such as crawler cranes, air compressors and excavators. Starting from 1 January 2019, the statutory emission standards for newly approved non-road vehicles have been tightened in phases to Euro VI, which is in line with the emission standards for newly registered road vehicles. All machinery to be used in specified activities or locations, such as Hong Kong International Airport, container terminals and construction sites, must bear EPD-issued labels.

Noise Pollution

Road Traffic Noise

To mitigate the impact of traffic noise on residents, proponents of development projects are required to assess traffic noise impact when planning new roads and residential developments, provide direct mitigation measures such as noise barriers and low-noise road surfacing for new roads, and adopt innovative noise mitigation designs such as acoustic balconies and windows. All newly registered vehicles must comply with internationally recognised noise standards. As regards existing roads, the government installs noise barriers and lays low-noise road surfacing materials, with 121 road sections enhanced through these efforts as at end-2020.

Railway Noise

In planning new railway projects, the MTR Corporation Limited must comply with a statutory environmental impact assessment. The department will request the company to make improvements if the noise emitted from existing railways exceeds the standards.

Aircraft Noise

The impact of aircraft noise on residents in the vicinity of flight paths at the airport is within planning standards, notwithstanding concerns about nuisance from aircraft noise during evenings and early mornings. The government will continue to explore practicable mitigation.

measures.

Construction Noise

The department issues construction noise permits to control noise from general construction works between 7pm and 7am and at all times on public holidays. Strict criteria under these permits restrict the use of equipment and the conduct of noisy manual activities in built-up areas. Percussive piling is prohibited at night and on public holidays, and requires a permit during the day on non-public holidays. The use of noisy diesel, steam and pneumatic piling hammers is generally banned, while hand-held percussive breakers and air compressors used in

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