AAHK and its key aviation-related business partners commit to achieve Net Zero Carbon by 2050, with a midpoint target of 55% absolute emissions reduction by 2035 from a 2018 baseline.
The impacts of climate change are already being observed worldwide, with many countries experiencing more frequent and intense extreme weather events. Given the location of Hong Kong International Airport (HKIA) and the criticality of its operations to Hong Kong and the neighbouring region, Airport Authority Hong Kong (AAHK) recognises the importance of assessing, planning, and preparing for climate change and the impacts it can have on HKIA's operations and future development.
Recognising the goals of the Paris Agreement, AAHK will significantly curb its emissions over the next 30 years and work collaboratively with business partners to reduce its direct and indirect emissions to accelerate the transition of HKIA to a low-carbon and climate-resilient airport, in line with the HKIA 2050 Net Zero Carbon Pledge and midpoint target.
We place significant efforts on reviewing our resilience to climate change impacts and we undertake collaborative action to futureproof HKIA. Following the completion of our comprehensive Climate Resilience Study in 2020/21, AAHK has been implementing an overarching Climate Adaptation and Resilience Plan and various departmental Climate Action Plans to ensure there is an ongoing approach to build resilience across our operations and developments.
While our previous study concluded that HKIA has a high level of preparedness and adaptive capacity to future climate change, the quick recovery following major recent climate events such as the September 2023 black rainstorm ('once-in-500-years storm') and Typhoon Saola (T10) has also reinforced this conclusion.
AAHK will continue to refine our approach to better understand the impacts of climate change. In 2024, we introduced a Climate Event Feedback Mechanism to capture detailed information relating to climate damage and operational impacts after climate events.
The details of AAHK’s approach to tackling climate change and managing its associated risks and opportunities are presented in the Task Force on Climate-related Financial Disclosures (TCFD) Statement.
Given that airport business partners contribute nearly 50% of the emissions under the HKIA 2050 Net Zero Carbon Pledge, AAHK works closely with the airport community under an airport-wide approach to implement carbon reduction measures and drive greenhouse gas (GHG) emissions reduction to achieve the target. The HKIA Carbon Reduction Programme is a platform for the airport community to measure, reduce and report carbon emissions and share best practices.
Since 2010, AAHK has collaborated with airport business partners and launched two short-term carbon intensity pledges to reduce HKIA's airport-wide carbon emissions.
Details of HKIA’s carbon emissions are available in AAHK's Sustainability Report 2023/24. During the second pledge, AAHK commenced preparations for a third pledge which was supported by a strategic study.
Moving to a Long-term Absolute Reduction Target
In April 2020, AAHK commenced an 18-month detailed study to set a new long-term absolute carbon reduction target. In 2021/22, the study concluded with a recommended target that aligned with the IPCC 1.5°C scenario, the HKSAR Government's 2050 carbon neutrality target and the Airports Council International (ACI) Long Term Carbon Goal of Net Zero Carbon by 2050. In line with previous pledges, AAHK aspired to continue working beyond its areas of control and following signficant consultation with the airport community was once again able to launched an airport-wide commitment in November 2021:
With buy-in from (now) 29 key aviation related business partners from key sectors, the Pledge covers emissions from airlines (excluding aircraft emissions), aircraft maintenance, aviation fuel suppliers, cargo handling, catering, GSE maintenance, government departments, ramp handling, fuel operators and more.
Business Partners Engagement
To achieve the proposed midpoint target, AAHK has developed the Carbon Management Action Plan, the HKIA Decarbonisation Roadmap and established the HKIA Business Partners Carbon Support Programme which includes four key pillars as follows:
In 2024, AAHK launched a revamped Carbon Management System, which is an online reporting platform with enhanced analytic functions to manage the emissions by AAHK and the business partners. Participating business partners can access the system at no cost, enabling them to calculate and analyse their carbon performance on a single platform.
In addition to the airport-wide approach, AAHK has also established a carbon management strategy focusing on four areas: energy efficiency, clean transportation, renewable energy and green buildings.
Energy Management and Energy Efficiency
Within AAHK, energy consumption, in particular electricity, is the major contributor to the GHG emissions.
The "Less Energy Go Green" initiative has also been introduced to enhance energy efficiency at our office premises. This energy-saving programme is implemented at HKIA Tower, HKIA Tower Two, and HKIA Commercial Building. The initiatives under the program include optimising lighting and air conditioning schedules to align with actual occupancy and demand, reducing the number of elevators in operation during off-peak hours to save energy and minimise operational costs, while still providing efficient vertical transportation services for occupants.
AAHK continues to upgrade our facilities with low carbon, energy efficient technology. Inside the terminals, cutting-edge building analytics are helping us to identify opportunities to deploy new energy-efficient initiatives. Within Terminal 1 (T1), we have been working on our innovative ‘SHADOW’ technology:
T1 is a standalone building which does not have any shading from nearby structures. The building’s extensive glazing creates substantial solar heat gain during the daytime, resulting in cooling challenges. To address this issue, the Solar Heat-gain Auto Decision On Wind-flow (SHADOW) system for air handling units (AHUs) has been adopted. This predictive control system adopts a Solar Prediction Dashboard to collect and analyse real-time weather data from the Hong Kong Observatory. By combining the historical weather data and real-time operational data from the Mechanical Building Management System (MBMS), the SHADOW system can accurately predict the cooling load required for T1.
The system provides recommendations for the space temperature setpoint of AHUs facing west, allowing an agile and efficient response to changes in weather conditions. This proactive approach minimises overcooling, reduces energy wastage, and optimises air volume and temperature throughout T1 around-the-clock.
Solar energy has the potential to reduce HKIA’s reliance on grid electricity which is not yet "clean energy".
Based on an airport-wide study and the subsequent solar implementation roadmap developed in 2023/24, AAHK has commenced detailed design and planning for the installation of solar panels at five existing AAHK buildings, with six additional projects at new buildings in the pipeline. In parallel, as another effort to facilitate the solar implementation roadmap, AAHK will continue to encourage the uptake of onsite solar within the airport community by sharing key findings with business partners. We have also selected certain business partners to conduct detailed solar assessments to explore potential uptake.
Airport Carbon Accreditation (ACA) was initially launched by ACI Europe in June 2009 and is the only institutionally endorsed carbon management certification standard for airports. The programme independently assesses the efforts of airports with six progressive levels of accreditation, including 'Mapping', 'Reduction', 'Optimisation', 'Neutrality', 'Transformation' and 'Transition'.
Our airport-wide carbon reduction programme enabled HKIA to be the first airport in Asia-Pacific to secure ACA Level 3 'Optimisation' in 2013, and we successfully maintained this achievement at every 3-year renewal in 2016 and 2019.
HKIA was awarded ACA Level 4 ‘Transformation’ in 2023. The accreditation recognises that the HKIA 2050 Net Zero Carbon Pledge is aligned with global climate goals to reduce absolute emissions. As well as reporting additional Scope 3 emissions in our carbon footprint, a comprehensive Carbon Management Plan was developed to demonstrate our pathway to achieving the target, and also a Stakeholder Engagement Plan to show our continuous collaboration with airport business partners and third parties to accelerate carbon reduction across HKIA.