7.3.7. Sulphur dioxide (SO2) emissions (g/inhabitant)
	1995	1999	2000	2001	2002	2003
Individual road passenger transport	154	188	192	192	192	76
Public road passenger transport	18	23	27	31	28	24
Road freight transport	79	103	107	122	131	88
Urban public transport	13	15	16	18	17	14
Rail transport - diesel traction	23	19	17	19	18	15
Waterway transport	3	2	2	2	2	1
Air transport	34	60	61	53	52	53
Transport total	324	410	422	437	439	272
						Source: CDV