The European Commission has sent a "final warning" to the UK for failing to address repeated breaches of legal air pollution limits.Read the full story ›
Authorities will temporarily clamp down on open-air barbecues, garbage incineration and wood burning to tackle China's chronic pollution.Read the full story ›
The backing of the world's two largest emitters of pollution could see the Paris deal brought into force before the end of the year.Read the full story ›
Any car registered before 1997 will be affected by the ban - and the UK is about to follow suit with the introduction of Clean Air Zones.Read the full story ›
After today's landmark Supreme Court ruling - which forces the government to take more action on air pollution - we look at the facts.Read the full story ›
Health experts urged people with breathing or heart problems to monitor their symptoms and avoid outdoor activities due to air pollution.Read the full story ›
Britain has been placed on a health alert as a potentially dangerous cloud of air pollution blows over the country.Read the full story ›
India's capital, New Delhi, has the worst air quality of any city in the world, according to figures published by the World Health Organisation.
The WHO measured the average levels of harmful particles known as PM2.5s to try to gauge which urban areas had the most dangerous pollution levels.
Indian cities occupied the top four places on the global list, and 13 out of the top 20 dirtiest cities.
There were three Pakistani cities in the top 20, along with the Qatari capital, Doha and cities in Iran, Turkey and Bangladesh.
The UK's governing body for cycling has said high levels of air pollution in some British cities are further evidence of the need to expand cycling.
It follows a study from the World Health Organisation that found nine British cities and towns had unsafe levels of air pollution.
Martin Key, campaigns manager for British Cycling, said: "With almost daily news stories about worrying levels of air pollution, it is clearer than ever that more cycling is the answer to many of the problems we face in Britain today."
"If local and national government put sustained and targeted investment into improving our roads and making them fit for cycling, we will without doubt create healthier, happier communities and more pleasant places to live," he added.
The World Health Organisation has warned that air pollution is "getting worse".
Only 12% of residents in cities that reported on air pollution were living in areas that comply with the WHO's guidelines.
The WHO estimates that in 2012 air pollution was responsible for the deaths of 3.7 million people around the world.
Although several British cities have been named as breaching safe air quality levels, cities in countries such as India, China and Pakistan have much higher levels of pollution.
Dr Flavia Bustreo, WHO's assistant director-general for family, children and women's health, said many cities were now "so enveloped in dirty air that their skylines are invisible".