A Falkirk firm set to launch a new generation of diesel-electric buses has been praised by the first minister.
Alex Salmond said Alexander Dennis was a key player in helping to reduce carbon emissions.
The company is about to launch a series of new bus models in Birmingham at the industry's main trade show, Expo Bus.
Alexander Dennis, which produces bus bodies at Camelon, said it already had orders worth £15m for 50 of the new vehicles.
The first 17 of the new "greener" buses will be used in London.
ADL chief executive Colin Robertson said: "In benchmark tests set by independent experts we have consistently recorded fuel and CO2 savings comfortably in excess of 30%.
"Equally important, we are seeing miles per gallon performance improve by over 40%. So the impact on transport fleets is potentially enormous."
Mr Salmond said: "Alexander Dennis is the industry blueprint for innovation in the development of sustainable transport.
"As the largest manufacturer of buses and coaches in the UK, the company's commitment to cleaner, greener, more sustainable transport is excellent and most welcome."
Mr Salmond said the Scottish Government had announced "ambitious" plans for cutting emissions by 80% by 2050.
"The opportunities for Scotland's modern and vibrant businesses like Alexander Dennis to develop low carbon products are vast," he said.
"The ultimate benefit is of course a cleaner, more sustainable future for Scotland and our future generations."