Hong Kong Airport Goes Net-Zero
Hong Kong International Airport is now the first in Asia to use renewable diesel for its ground fleet, a major step in its new commitment to reach Net Zero Carbon by 2050. The airport authority and 29 business partners are targeting a 55% carbon reduction by 2035, signaling a massive shift in sustainable design for large-scale infrastructure.
The renewable diesel pilot uses a type of hydrotreated vegetable oil (HVO), which is sourced from waste materials like used cooking oils and animal fats. This fuel is fully compatible with existing diesel engines in ground support equipment, such as baggage tractors and mobile generators, eliminating the need for immediate and costly fleet replacement. Key collaborators in this pilot project include Hong Kong Air Cargo Terminals Limited (Hactl) and Shell Hong Kong Limited. This initiative is a core component of the airport's broader strategy to achieve net-zero carbon by 2050, which uses 2018 as a carbon baseline. The plan also includes electrifying all airside vehicles, installing more energy-efficient chillers and LED lighting, and developing new energy management solutions. Airport Authority Hong Kong (AAHK) is driving the transition with more than just operational changes. It has established a HK$20 million (US$2.56 million) Green Innovation and Technology Fund to support its business partners in developing and trialing new carbon-reduction technologies. This fund is part of a wider Business Partner Carbon Support Programme designed to build skills in carbon management across the airport community. The move has garnered international praise, earning Hong Kong International Airport the Gold Award in the ACI Green Airports Recognition 2025. This places HKIA among other leading airports in the Asia-Pacific region with strong sustainability commitments, such as Singapore Changi Airport, which won Platinum for its rooftop solar project, and Kansai International Airport, recognized for its work on a local Sustainable Aviation Fuel (SAF) supply chain. For large architectural firms, integrating sustainability is now a key design driver in major airport projects. Gensler's design for Incheon International Airport's Terminal 2, for example, incorporates extensive photovoltaic cells and indoor green spaces to reduce energy loads. Similarly, their LEED Silver-certified Terminal 2 at Mineta San Jose International Airport was an early benchmark for sustainable airport design. Firms like HOK and SOM are also leaders in this space, focusing on biophilic design and net-zero readiness. HOK's design for the new terminal at Monterey Regional Airport is targeting LEED Platinum and net-zero energy, using natural landscaping and materials that reflect the local environment. SOM's Terminal 2 at Kempegowda International Airport in Bengaluru is conceived as a "terminal in a garden," using engineered bamboo and lush interior flora to create a sustainable and calming passenger experience.
