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Civil Aviation Authority of Singapore

Airport sustainability initiatives

Learn about the sustainability initiatives implemented in our airports.

Last updated 9 May 2026

Reducing energy use and deploying renewables

Airports are complex ecosystems that serve as gateways for air travel and connectivity. They are highly energy-intensive due to their large scale and operational demands.

CAAS has introduced several initiatives to reduce energy use and expand the use of renewables.

Cleaner energy airside vehicles

CAAS has set a target for all airside vehicles at Changi Airport to operate on cleaner energy by 2040. This will be achieved through:

  • fleet electrification

  • use of renewable diesel

  • adoption of hydrogen-powered vehicles

Today, 30% of the airside fleet is already electric.


Electrification of airside fleet

From March 2025, all new Class 3 airside vehicles, forklifts and tractors must be electric.

To support this, CAAS and A*STAR have completed a study to assess how large-scale electrification could affect Changi Airport’s existing power grid and inform the expansion of the charging network.


Renewable diesel for heavy ground support equipment

With fewer electric alternatives available for heavy ground support vehicles, renewable diesel is a practical nearer-term decarbonisation solution.

Trials completed successfully in 2025 proved that renewable diesel can be used as a drop-in fuel for this equipment.

Solar power deployment

CAAS and Changi Airport Group are working together to scale up solar power deployment at Changi Airport and Seletar Airport.


Solar panels on rooftops

At the end of 2025, Changi Airport had more than 20MWp of installed solar capacity. This was equivalent to about 4% of its 2019 energy consumption.

With more solar projects under way, the share is expected to increase to 10% by end of 2026.


Solar power deployment within the airfield

A feasibility study on deploying solar photovoltaic systems has been completed.

The findings are being used to plan for solar deployment within the airfield.

Energy efficient buildings

CAAS, Changi Airport Group and airport partners are working to improve the energy efficiency of Changi Airport’s terminal buildings.

A key focus is air-conditioning, which accounts for more than half of the terminals’ electricity use.

Measures include:

  • upgrading cooling systems

  • using heat-reflective façade materials

  • replacing lighting in Terminals 1, 2 and 3 with energy-efficient LEDs

In 2025, AI was introduced at Terminal 3 to optimise air-conditioning systems.

The new Terminal 5 will be designed to achieve the Green Mark Platinum Super Low Energy Building standard. For higher energy efficiency, the terminal may include:

  • district cooling

  • space stratification

Contact information

Sustainability Office
Contact us using the Enquiries & Feedback Form (opens in new tab).