Pollution

Party is committed to planting 3.5m trees if they stay in power in attempt to woo back voters from the Greens and Labour

Boris Johnson calls on Westminster government to step up efforts to tackle UK's dangerously high pollution levels with new manifesto

Diesel vehicles expected to face £10 charge from 2020 to enter capital's planned ultra low emission zone

New scheme launches in Victoria after Mayor branded claims Oxford Street has world's worst NO2 levels as 'b*ll*cks'

Government to buy nearly 300 plug-in vehicles as it puts 'money where its mouth is'

Defra predicts many cities will not comply with EU limits for at least another decade

New research comes as EU Court of Justice prepares to hear case over UK's failure to meet legal air quality limits

British Geological Survey and the Environment Agency publish data showing proximity of shale deposits to major aquifers

France, Germany and Ireland among those emitting too many pollutants, as UK remains on track to meet its goals

New World Health Organisation (WHO) database shows British cities are among those failing to meet air quality standards