In particular, the new data reveal a stronger link between both indoor and outdoor air pollution exposure and cardiovascular diseases, such as stroke and ischaemic heart disease, as well as between air pollution and cancer. This is in addition to air pollution’s role in the development of respiratory diseases, including acute respiratory infections and chronic obstructive pulmonary diseases.
The new estimates are not only based on more knowledge about the diseases caused by air pollution, but also upon better assessment of human exposure to air pollutants through the use of improved measurements and technology. This has enabled scientists to make a more detailed analysis of health risks from a wider demographic spread that now includes rural as well as urban areas.
Included in the assessment is a breakdown of deaths attributed to specific diseases, underlining that the vast majority of air pollution deaths are due to cardiovascular diseases as follows.
|
Disease |
Percentage of outdoor air pollution-caused deaths |
Percentage of indoor air pollution-caused deaths |
|
Ischaemic heart disease |
40 |
26 |
|
Stroke |
40 |
34 |
|
Chronic obstructive pulmonary disease |
10 |
22 |
|
Lung cancer |
6 |
6 |
|
Acute lower respiratory infections in children |
4 |
12 |
The new estimates are based on the latest WHO mortality data from 2012, as well as evidence of health risks from air pollution exposures. Estimates of people’s exposure to outdoor air pollution in different parts of the world were formulated through a new global data mapping. This incorporated satellite data, ground-level monitoring measurements and data on pollution emissions from key sources, as well as modeling of how pollution drifts in the air.
Related links
News release: 7 million premature deaths annually linked to air pollution
Ambient (outdoor) air quality and health (factsheet)
Household air pollution and health (factsheet)
