Relative air pollution contribution of different vehicles
Category		Percent share of pollutants			Annual growth (%)
	CO	HC	NOx	PM
Truck	13.41	8.59	59.67	47.45	7.77
Bus	10.30	9.65	18.54	29.38	2.48
Mini Bus	7.25	3.91	6.50	19.09	6.83
Utility	6.29	4.35	2.84	0.70	10.22
Car/Taxi	38.16	18.24	6.16	1.22	9.39
Auto/Tempo	10.56	26.92	5.99	1.19	31.00
M Cycle	14.03	28.34	0.29	0.98	8.12
Source : Compendium of Environment Statistics of Bangladesh 2004, BBS.