Mayor of London Boris Johnson has announced 12 hydrogen-powered cars will be rolled out in the city.
Transport for London will use four of them to assist with essential engineering and maintenance work carried out between bus stops and Tube stations.
Manufacturer Toyota will deliver the Mirai hydrogen-powered vehicles.
They are expected to be used by private hire fleets and green minded businesses including energy storage and clean fuel company ITM Power by the end of the year, according to the Mayor.
It is part of his plans to pioneer the use of the cleanest, greenest technology for the future of transport and infrastructure in the capital.
Mr Johnson said: “It is fantastic that London will benefit from these new state-of-the-art hydrogen vehicles. By embracing this technology of the future, we aim to consolidate hydrogen’s role as a practical alternative fuel for the 21st century and beyond.
“I am sure that Transport for London will provide the ideal environment for us to see everything the Mirai can do and, in doing so, take another great step towards improving air quality in our city and protecting the health of Londoners.”