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Legislative Council Panel on Environmental Affairs

Greenhouse Gas Emissions and their Effects on Global Warming

This paper informs Members of the latest trend of greenhouse gas (GHG1) emissions, their effects on global warming and the measures being taken to reduce greenhouse gas emissions in Hong Kong.

Greenhouse Gas Reduction Measures - Building Energy Efficiency

20. The Electrical and Mechanical Services Department (EMSD) has launched an Energy Efficiency Registration Scheme for Buildings since 1998 to promote the application of the Building Energy Codes covering lighting, air conditioning, electrical, lift and escalator installations.

21. A technical circular was issued in November 2005 to require all works departments to apply energy efficient features in new Government buildings and retrofit projects where feasible. All new Government buildings and retrofit projects are also required to fully comply with the Building Energy Codes. Energy audits and re-audits were also conducted in over 200 major Government venues. Energy saving projects have been implemented to reduce the electricity consumption in these buildings.

22. Planting on the rooftop could help attenuate urban heat island effect in the dense urban areas and might contribute to reducing electricity consumption for air-conditioning. In the 2006/07 Policy Address, the Administration pledges to adopt the concept of green roofing whenever practicable in the design of new Government buildings. Since 2001, about 50 Government buildings have incorporated rooftop planting or flat roof landscaping while another 30 projects are under planning or construction. The Architectural Services Department has recently completed a study on Green Roof Application in Hong Kong.