Fully electronic cars will now be presented on the Uber app as the taxi firm tries to help tackle air pollution in London.
With the first battery-powered vehicles hitting the capital's roads from Wednesday, the company said more than 50 fully electric cars will be available on the app in the capital by the end of September.
Uber said it also has plans to introduce the vehicles to at least one other UK city this autumn.
Jo Bertram, regional general manager of Uber in the UK, alleged: "People already associate Uber with hybrid cars, but we now want to go a big step further with fully electric cars on the road from today.
"We are determined to use technology to help tackle the challenge of air pollution in London and across the UK.
"Our car-sharing service has already saved more than 1.3 million miles and 231 metric tonnes of carbon dioxide.
"With electric vehicles - and more people sharing their journey and leaving their own cars at home - there's even more we can do."
More than 60 per cent of Uber trip miles in London now take place in hybrid cars, and the car-sharing service UberPool which launched in the city last year has saved more than 98,000 litres of petrol.
The new Uber option has been carried to the roads in partnership with car manufacturers BYD and Nissan.
A three-month study into the electric vehicles programme will be conducted by the Energy Saving Trust.
It will look at the feasibility of running large records of private hire vehicles in the UK, as well as the experience, driving patterns, economics and capacity of London's current network of charging points to support the cars.
And if the programme is successful, Uber supposes to have hundreds of fully electric vehicles running on its app next year.
Ms Bertram added: "Of course there are challenges ahead. A bigger roll-out of fully electric cars needs a good network of charging points and the economics must add up for drivers too.
"That's why the three-month study by the Energy Saving Trust is so important.
"We look forward to seeing the results and sharing the findings with the Government, Transport for London and the Mayor."