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This double decker bus in Aberdeen, Scotland, is a world first.
It's driven by hydrogen rather than diesel or electricity.
In the 1970s, Aberdeen was known as the capital of Europe's oil industry.
However, it's now leading the way in developing greener industries.
The 15 hydrogen powered buses form part of its wider strategy.
As the only emission from these vehicles is water, they will help Aberdeen become carbon neutral by 2045.
Philip Bell is a City Councillor.
Hydrogen powered buses have a wider range than electric buses.
The city also has its own hydrogen production and bus refuelling stations.
It's now hoping passengers realise the benefits of this low carbon public transport.
David Phillips is the Operations Director of the bus company.
The project is funded by both the Scottish government and the European Union.
Other UK cities are expected to follow Aberdeen.
Hydrogen powered public transport could soon be a reality for London, Birmingham, Dundee and Brighton.
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