91% of the world's population live in areas with air pollution above WHO limits

WHO

safe level

2x

4x

6x

8x safe level

10

20

40

60

80 micrograms

Annual mean concentration of PM2.5*

per cubic metre air in urban areas

Nine of the world’s 10 most polluted cities in 2018 are in India, including Kanpur (173 micrograms) and Delhi (143)

Delhi

Kanpur

Kampala

Bamenda, Cameroon, recorded 132 micrograms in 2016. Kampala, Uganda, recorded 104

Baoding, China, recorded 93 micrograms in 2018

WHO

safe level

2x

4x

6x

8x safe level

10

20

40

60

80 micrograms

Annual mean concentration of PM2.5* per cubic metre air in urban areas

Delhi

Kanpur

Baoding, China, recorded 93 micrograms in 2018

Kampala,

Uganda

Lima, Peru, was South America’s most polluted capital city in 2018, recording PM2.5 at four times the WHO safe level

Bamenda,

Cameroon, recorded 132 micrograms in 2016. Kampala recorded 104

Nine of the world’s 10 most polluted cities in 2018 are in India, including Kanpur (173 micrograms) and Delhi (143)

WHO

safe level

2x

4x

6x

8x safe level

10

20

40

60

80 micrograms

Annual mean concentration of PM2.5* per cubic metre air in urban areas

Delhi

Kanpur

Baoding, China, recorded 93 micrograms in 2018

Kampala

Lima, Peru, was South America’s most polluted capital city in 2018, recording PM2.5 at four times the WHO safe level

Bamenda, Cameroon, recorded 132 micrograms in 2016. Kampala, Uganda, recorded 104

Nine of the world’s 10 most polluted cities in 2018 are in India, including Kanpur (173 micrograms) and Delhi (143)