Air pollution in Beijing has reached a new high in the past few days. The World Health Organisation (WHO) warns that exposure to particulate matter increases the risk of many chronic and acute respiratory conditions in children and adults. The WHO air quality guidelines indicate that by reducing particulate matter (PM10) pollution from 70 to 20 micrograms per cubic metre, air quality related deaths can be reduced by around 15%. Explore the map below to see annual exposure to outdoor air pollution mapped.
• Get the data behind the map

Exposure to outdoor air pollution: mapped by city | News | guardian.co.uk.