London's public transport network is about to get a lot greener, with Mayor Boris Johnson announcing that the world's first purpose-built pure electric double-decker bus will hit the city's streets later this year. The announcement was made at the Clean Bus Summit, where 24 cities around the world committed to putting ultra-low emission buses on the road.

Public transport in the UK's biggest city has been inching toward a greener future for years now, announcing its first hybrid buses back in 2009. There are now more than 1,300 of those on the streets of the capital, and it's time for the next big step.

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The new all-electric buses were produced in conjunction with BYD, which worked on the tricky problem of fitting enough batteries into the zero emissions vehicles to provide enough power.

There's no mention of exactly how many all-electric buses are heading for London, but the first is due to arrive in October, which will enter service on route 16 in October, running between Victoria Station and Cricklewood.

It's not just London that's revising its public transport infrastructure for the better. The move forms part of a wider effort, with 24 cities around the world planning to put 40,000 ultra-low emission buses on the road by 2020.

Source: Mayor of London

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