More than 200 of Belfast City Council’s fleet vehicles are now running on hydrotreated vegetable oil (HVO) rather than diesel.
Elected members approved the fuel switch last December after a trial on a selection of vehicles during the summer.
The transitioning of vehicles began earlier this year.
HVO is a low-carbon, zero-sulphur fuel made from waste renewable materials like rapeseed and sunflower oil.
A council spokesperson said HVO fuel eliminates up to 90% of CO2 emissions when compared to fossil diesel and significantly reduces nitrogen oxide (NOx), particulate matter (PM) and carbon monoxide (CO) emissions.
“As a council we recognised the need for a cleaner and more sustainable alternative to diesel and I am delighted that diesel fuel used in 200 council vehicles including HGVs and street sweepers have now switched to HVO – with no modifications to vehicles needed.
“This switch not only reduces carbon emissions but aims to improve air quality across the city.
“Additionally, HVO is odourless, improves fuel efficiency, has zero palm oil content and is completely biodegradable.”
The Lord Mayor added: “Climate change is the most pressing challenge of our generation and improving transport infrastructure within council will help us reach our targets on moving towards a net zero economy.
“There is work still to be done but we are moving in the right direction and this progressive switch to HVO aligns with the commitments we made as part of our climate action plans for the city.”