Air pollution

No clean air zone charges for fire service vehicles

Emergency vehicles to be charged in clean air zone

High pollution levels inside homes, research shows

Mayor denies £100m wasted on axed clean air zone

London drivers pay more than £70m in Ulez fines

Two city areas over nitrogen dioxide legal limits

Wolves join European air quality monitoring league

Bangkok tackles smog with week-long free public transport. Video, 00:00:24Bangkok tackles smog with week-long free public transport

Mayor's clean air plan with no charges backed

Wakefield air quality improves across district

Parking charges to increase for town's polluting cars

Smog causes travel chaos in Indian capital Delhi

What in the World. How asthma is affecting Africa. Audio, 11 minutesWhat in the World

Fines for parents who leave cars running - council

Expert warns of public health emergency as Delhi's toxic air returns

Wood burners warning as smoke controls brought in

£2.5m clean air zone cash still on offer - council

Cosy fires can kill, warns campaign

Why there's no song and dance around India's killer air

The families fleeing Delhi to escape deadly smog

Why most Indians choking on smog aren’t in Delhi

The Global Story. Delhi smog: 'My eyes are stinging' Audio, 27 minutesThe Global Story

Living in Delhi smog is like watching a dystopian film again and again