迈向更美好的香港：2050年实现净零碳排放蓝图（英文版）_94页_4mb

Summary of "Towards a Better Hong Kong: Pathways to Net Zero Carbon Emissions by 2050"

Core Content

This report outlines a comprehensive strategy for Hong Kong to achieve net zero carbon emissions by 2050, aligning with global climate goals and the Paris Agreement. It emphasizes the importance of a long-term, aggressive decarbonisation plan, focusing on key sectors such as electricity generation, building energy efficiency, and transportation. The study also explores opportunities in waste management, international travel, and lifestyle changes to further reduce emissions.

Main Views and Key Information

1. Global Climate Context

• The Paris Agreement aims to limit global warming to well below 2°C and pursue 1.5°C.
• To achieve this, global greenhouse gas (GHG) emissions need to be cut in half by 2030 and reach net zero by 2050.
• Cities are critical in achieving these goals due to their role in implementing emission-reduction policies.

2. Hong Kong's Emission Profile

• In 2017, Hong Kong's GHG emissions were 37.9 million tonnes of CO₂e, excluding waste, agriculture, and forestry.
• Per capita emissions were 5.2 tonnes in 2017.
• Under the Current Policy Scenario, emissions are projected to decrease to 22 MtCO₂e by 2050, or 2.8 tonnes per capita.
• Under the Decarbonisation Scenario, emissions could be reduced to 3.9 MtCO₂e by 2050, or 0.5 tonnes per capita.

3. Emission-Reduction Potential

• Total emissions-reduction potential from now to 2050 is 32 MtCO₂.
• The main contributors to emissions reductions are:
  • Decarbonising power generation (27 MtCO₂)
  • Improving building energy efficiency (10.6 MtCO₂)
  • Improving mobility (6.7 MtCO₂)

4. Key Policy Recommendations

• Expand renewable energy on a large scale.
• Explore regional nuclear energy as a source.
• Generate power from zero- or near-zero carbon hydrogen.
• Use natural gas with carbon capture and storage (CCS).
• Store electricity to reduce demand during peak times.
• Optimize demand response to improve grid efficiency.
• Replace town gas and non-transport liquefied petroleum gas (LPG) with zero-carbon electricity.
• Replace town gas with zero- or near-zero carbon hydrogen.
• Set targets, track performance, and improve transparency in building energy efficiency.
• Tighten policies and regulations.
• Improve energy audits and increase retrofitting.
• Improve demand management and user behaviour.
• Avoid journeys through better urban planning.
• Shift to lower-carbon transport modes.
• Improve the efficiency and lower the carbon intensity of mobility.
• Increase the reporting and management of carbon emissions.
• Impose a carbon price.
• Reduce emissions from the waste sector.
• Reduce emissions from international travel.
• Promote lifestyle changes to lower emissions.

5. Environmental and Economic Benefits

• Achieving net zero emissions by 2050 would significantly reduce local air pollution, including PM₂.₅ and PM₁₀, with a projected 59% reduction in 2050.
• It would also increase life expectancy, saving an estimated 26,000 lives between 2018 and 2050.
• The economic benefits are substantial, with an estimated HK$460 billion in new wealth by 2050, equivalent to 0.3% of GDP.
• These benefits include saved capital and operation costs (HK$290 billion) and avoided deaths and climate-related costs (HK$170 billion).

6. The Need for Immediate Action

• Delaying action makes emission reductions steeper and more difficult.
• Hong Kong needs to adopt an annual reduction rate of 6.6% from now to 2050 to meet the net zero target.
• The current policy trajectory only allows for a reduction of 0.8–2.2% per year between 2020 and 2030.
• The report stresses that HK 2050 Is Now is a critical initiative to ensure timely and effective decarbonisation.

7. Government Role and Public Engagement

• The Hong Kong government launched a public engagement program in June 2019 to gather public opinion on decarbonisation.
• It is expected to announce the results later in 2020 and then develop a long-term decarbonisation strategy.
• This report provides inputs for the development of such a strategy and demonstrates its feasibility.

Conclusion

Hong Kong has the potential to achieve net zero emissions by 2050, and this transformation is technically and economically feasible. The report outlines a roadmap for achieving this goal, highlighting the importance of policy implementation, public participation, and sector-specific actions. It concludes that a coordinated effort from the government, private sector, and public is essential to ensure a just and sustainable transition to a decarbonised Hong Kong.