New buses powered by hydrogen fuel joined London's fleet in 2011. They are currently running on route RV1 between Covent Garden and Tower Gateway Station.
This is part of our bid to reduce CO2 emissions from transport and tackle climate change.
Mayor Boris Johnson has set tough targets to cut CO2 emissions by 2025. Hydrogen powered vehicles offer a significant step towards achieving this goal.
From December 2003 to January 2007, London took part in the Cleaner Urban Transport for Europe (CUTE) trial, and its one year extension, to reduce air pollution and noise by testing the first generation of zero-emission fuel cell buses.
The success of this trial led to the introduction of the new hydrogen powered buses and a refuelling station in London.