Table 3.

Comparison of the concentration of PAHs in non-burning period with open burning period.

PAHs Number	Cities	Non-Burning Period (ng/m3)	Open Burning Period (ng/m3)	Reference
16	Taichung, China	11.0 ± 1.51	30.8 ± 3.93	[41]
9	Hanoi, Vietnam	14.4 ± 3.69	4488 ± 3850	[53]
9	Hanoi, Vietnam	2.60 ± 1.31	3064 ± 2370	[53]
16	Bangkok, Thailand	32.4 ± 17.1	108 ± 25.7	[66]
14	Klong Luang, Thailand	43.4 ± 20.0	414 ± 24.0	[67]