Standards for emission from motor vehicles
Parameter	Unit	Standard limit
Black Smoke	Hartidge Smoke Unit (HSU)	65
Carbon monoxide	gm/k.m.	24
	percent area	04
Hydrocarbon	gm/k.m.	02
	ppm	180
Oxides of nitrogen	gm/k.m.	02
	ppm	600
Source: Directorate of Environment (DOE), Compendium of Environment Statistics of Bangladesh 2004, BBS.