Bus operators in Scotland are being invited to bid for a share of a £3 million fund to promote greener vehicles.
The extra cash is being made available for the Scottish Green Bus Fund, which helps equip buses with technology to reduce fuel usage and emissions.
Scottish Transport Minister Derek Mackay said: “Increasing the number of low carbon vehicles in the Scottish fleet achieves a number of government aims – helping to reduce greenhouse gas emissions and improve air quality by accelerating the replacement of older, more polluting vehicles.
“The newer greener vehicles can be used to attract more passengers and also benefit manufacturers by increasing demands for their more innovative products.”
The Scottish Government has so far provided grants totalling almost £13 million, which will help introduce more than 260 new low emission buses in Scotland by March 2016.
Last month the UK Government offered £5 million for greener buses in a bid to cut pollution.