London

Simon Birkett of Clean Air in London says the government must act on the Environmental Audit Committee's recommendations

Up to 50 vehicles will be involved in experiment backed by David Cameron and Boris Johnson

London Assembly urges mayor Boris Johnson to cut levels of nitrogen dioxide instead of relying on wider UK policy

Norman Foster's plans for a new £50bn aviation, rail and communications hub features 5km long tidal array

New fuel station to support 15 hydrogen-powered black cabs and five scooters

But Mayor Boris Johnson warns people are failing to take advantage of subsidised retrofitting schemes

Boris Johnson angers green groups by claiming a new South-East hub is needed to avoid exporting jobs and emissions abroad

Firms in the City of London urge Transport for London to adopt corporate payment system for popular cycle hire scheme

UK particulate filter manufacturer also reveals it is developing lower-cost NOX filter