Table 1.5.3: Key category analysis for the 2005 inventory – Tier 1 trend assessment including LULUCF (a) and excluding LULUCF (b)

(a) Tier 1 Category Trend Assessment - including LULUCF
IPCC Categories	Gas	Base year estimate Gg	2005 estimate Gg	trend assessment	Contribution to trend	Cumulative total
Emissions from enteric fermentation in domestic livestock	CH₄	21806.54	23919.80	0.034	17.6	17.6
Mobile combustion - road vehicles	CO₂	7535.48	12444.08	0.032	16.5	34.0
Emissions from stationary combustion - solid	CO₂	3227.01	6727.23	0.028	14.6	48.6
Emissions from stationary combustion - gas	CO₂	7691.14	7589.75	0.021	10.8	59.4
Emissions from solid waste disposal sites	CH₄	2122.92	1460.70	0.012	6.4	65.8
Direct emissions from agricultural soils	N₂O	475.16	1762.87	0.012	6.3	72.1
Forest land remaining forest land	CO₂	20624.90	26767.89	0.011	5.7	77.8
Emissions from agricultural soils - animal production	N₂O	6856.67	7559.46	0.010	5.3	83.1
Emissions from substitutes for ozone depleting substances	HFCs	0.00	741.56	0.008	4.0	87.1
PFC's from aluminium production	PFC	515.60	80.70	0.006	3.0	90.2
Fugitive emissions from oil and gas operations	CO₂	263.48	650.24	0.003	1.7	91.9
Other-emissions from liming	CO₂	346.42	714.21	0.0029	1.52	93.4
Conversion to grassland	CO₂	706.91	706.91	0.0018	0.94	94.4
Conversion to forest land	CO₂	870.01	1254.72	0.002	0.9	95.3

(b) Tier 1 Category Trend Assessment - excluding LULUCF
IPCC Categories	Gas	Base year estimate Gg	2005 estimate Gg	trend assessment	Contribution to trend	Cumulative total
Emissions from enteric fermentation in domestic livestock	CH₄	21806.54	23919.80	0.0339	19.4	19.4
Mobile combustion - Road vehicles	CO₂	7535.48	12444.08	0.0317	18.2	37.6
Emissions from Stationary combustion - solid	CO₂	3227.01	6727.23	0.0281	16.1	53.8
Emissions from Stationary combustion - gas	CO₂	7691.14	7589.75	0.0208	11.9	65.7
Emissions from solid waste disposal sites	CH₄	2122.92	1460.70	0.0123	7.1	72.7
Direct emissions from Agricultural soils	N₂O	475.16	1762.87	0.0122	7.0	79.7
Emissions from agricultural soils - animal production	N₂O	6856.67	7559.46	0.0103	5.9	85.6
Emissions from substitutes for Ozone depleting substances	HFCs	0.00	741.56	0.0077	4.4	90.0
PFC's from Aluminium production	PFC	515.60	80.70	0.0058	3.3	93.4
Fugitive emissions from Oil and Gas operations	CO₂	263.48	650.24	0.0033	1.9	95.3