Air pollution

Fire crews get testing kit after gas cloud

'Mysterious' smell gets up Tehran noses

Scotland's first low-emission zone launched

London transport review of 2018

Minicabs to pay London congestion charge

Taxis oppose city clean air charge

CO2 emissions reach 'all-time high'

Is Delhi's air causing lung cancer? Video, 00:01:39Is Delhi's air causing lung cancer?

Madrid bans old cars to cut pollution

Is China behind global coal power surge?

A city that is turning streets into gardens. Video, 00:02:59A city that is turning streets into gardens

Health Check. The Health Impact of Smoke from Californian Wildfires. Audio, 27 minutesHealth Check

Plan to pedestrianise centre of Paris

London pollution 'stunts lung capacity'

Things Indians do to beat pollution

Toxic smog returns to Delhi after Diwali

Choking Delhi smog draws protests. Video, 00:00:57Choking Delhi smog draws protests

Delhi panic over toxic air ahead of Diwali

Air pollution 'never measured' in hotspot

Russian glitch voids 5m traffic tickets

Air pollution early deaths rise in EU

City roads could shut during school run

How a food crisis led to Delhi’s foul smog