The airport has switched 34 ground vehicles from diesel to hydrotreated vegetable oil (HVO), which is a renewable fuel that eliminates up to 90% of CO2 emissions. HVO can be dropped in as a fuel replacement for existing vehicles that previously ran on diesel.

There are also plans for another 30 vehicles to be switched to HVO in the next few months and the airport has installed an on-site HVO pump.

Gordon Robertson, director of communications and sustainability at Edinburgh airport, said: “Zero carbon is just one of the pillars in our Greater Good sustainability strategy, and we are constantly evaluating ways of decarbonising our and our partners’ operations across the campus.

“Introducing the use of vegetable oil in our airside vehicles is part of our strategy to means we can now actively chip away at our emissions by replacing diesel with a renewable fuel source, driving down our environmental impact as we look to deliver a more sustainable future for the airport.”