Pollutant	1999	2000	2001	2002	2003	2004
CO2	18.10	21,838	22,489	15,467	18,798	19,798
CH4	86.5	98.4	111.6	72.8	87.0	90.7
VOCs	135.3	160.2	183.3	100.4	117.2	122.2
Gas flared	6458	7693	7909	5222	6385	6611
SOx	1.5	1.7	1.8	1.1	1.1	1.1
NOx	20.1	17.8	27.3	22.3	23.1	21.9
HCFC/CFC	2650	3459	1901	2960	1198	2403