Year

City

Average Mass Concentration (μg∙m⁻³)

Particle Diameter Range (μm)

2002

Los Angeles (USA)¹

47.58

0.006 - 0.22

2004

Mexico City (MEX)

6.08

0.003 - 0.040

2011

Lucknow (IND)³

8.31

0.05

2013

São Paulo (BRA)²

52.30

0.048