Bus Éireann has committed to cutting total greenhouse gas emissions by 50% by 2030.
Ireland's national bus company said it also plans to grow passenger numbers by 30%, including school transport, to 116 million a year.
Today, Bus Éireann published its first sustainability strategy, which outlines targets across a number of areas including climate action and waste.
Minister for Transport, Eamon Ryan said he is impressed by the ambition laid out in the new strategy and fully support their plans.
"Better and more frequent services will benefit public transport users and provide an attractive alternative to those frequently travelling by car," he said.
"This strategy will also help us meet our climate commitments; achieving a 50% electric-powered bus fleet by 2030, and increasing the number of people who choose public transport, will help us transform how we travel in Ireland," he added.
Stephen Kent, Chief Executive Officer, Bus Éireann said they will move from having 1,100 diesel-fuelled buses and coaches on the road, to half of those being zero emission in the next nine years.
"This year, funded and supported by the National Transport Authority, we will deploy 61 hybrid buses, beginning in Galway, three hydrogen-fuelled buses for Dublin commuter routes and the tender is live to source battery electric vehicles for the Athlone town service," Mr Kent said.
Mr Kent said this will positively impact not only emissions but also air quality in urban areas.
From a customer perspective, Mr Kent said they want to make bus travel the first choice especially for people living in towns and cities.
"Right now, bus and coach travel is inherently more sustainable as it emits up to one-fifth the carbon dioxide per passenger kilometre, compared to private cars," he said.
Currently 79% of adult journeys outside of Dublin are by private car, according to Bus Éireann.