Dublin Bus has announced plans to have a zero emissions fleet by 2050 with the first totally electric bus route within three years.
The company has 14 plug-in Hybrid Electric buses in service with a further six due soon and plans to have a route with a fully electric vehicle within three years.
In a statement, Dublin Bus said its current buses produce 87% less emissions per person than car users and it it has reduced emissions by 5% since 2017.
It also spent €15 million in restoring and upgrading the old Broadstone Depot to maintain hybrid and fully electric vehicles.
The company carried up to 142 million passengers per year before the pandemic taking around 160,000 cars off the road each day.
The company is planning to increase its fleet by 330 buses by 2027 in anticipation of increased demand as a result of the Bus Connects programme.
Within ten years, the company said 50% of the fleet will be made up of diesel hybrid and battery electric vehicles.
Head of Environmental, Health and Safety, Colin Ward said: "Dublin Bus will continue to deliver solutions that meet the city's needs and fulfil our dual mandate of embedding sustainability into everything we do and seeking new and better ways to enable and encourage sustainable behaviour for our customers".