Table 1.5.2 (a&b) Key category analysis for the 2005 inventory – Tier 1 level assessment including LULUCF (a) and excluding LULUCF (b)

(a) Tier 1 Category Level Assessment - including LULUCF
IPCC Categories	Gas	2005 estimate Gg	Level assessment	Cumulative total
Forest land remaining forest land	CO₂	26767.89	24.9	24.9
Emissions from enteric fermentation in domestic livestock	CH₄	23919.80	22.2	47.1
Mobile combustion - road vehicles	CO₂	12444.08	11.6	58.7
Emissions from stationary combustion - gas	CO₂	7589.75	7.1	65.8
Emissions from agricultural soils - animal production	N₂O	7559.46	7.0	72.8
Emissions from stationary combustion - solid	CO₂	6727.23	6.3	79.1
Indirect emissions from nitrogen used in agriculture	N₂O	3384.65	3.1	82.2
Emissions from stationary combustion - liquid	CO₂	3128.98	2.9	85.1
Direct emissions from agricultural soils	N₂O	1762.87	1.6	86.7
Emissions from the iron and steel industry	CO₂	1662.00	1.5	88.3
Emissions from solid waste disposal sites	CH₄	1460.70	1.4	89.7
Conversion to forest land	CO₂	1254.72	1.2	90.8
Mobile combustion - aviation	CO₂	1015.99	0.9	91.8
Emissions from substitutes for ozone depleting substances	HFCs	741.56	0.7	92.5
Emissions from manure management	CH₄	739.48	0.7	93.1
Other-emissions from liming	CO₂	714.21	0.7	93.8
Conversion to grassland	CO₂	706.91	0.7	94.5
Cropland remaining cropland	CO₂	671.12	0.6	95.1

(b) Tier 1 Category Level Assessment - excluding LULUCF
IPCC Categories	Gas	2005 estimate Gg	Level assessment	Cumulative total
Emissions from enteric fermentation in domestic livestock	CH₄	23919.80	31.0	31.0
Mobile combustion - road vehicles	CO₂	12444.08	16.1	47.2
Emissions from stationary combustion - gas	CO₂	7589.75	9.8	57.0
Emissions from agricultural soils - animal production	N₂O	7559.46	9.8	66.8
Emissions from stationary combustion - solid	CO₂	6727.23	8.7	75.5
Indirect emissions from nitrogen used in Agriculture	N₂O	3384.65	4.4	79.9
Emissions from stationary combustion - liquid	CO₂	3128.98	4.1	84.0
Direct emissions from agricultural soils	N₂O	1762.87	2.3	86.3
Emissions from the iron and steel industry	CO₂	1662.00	2.2	88.4
Emissions from solid waste disposal sites	CH₄	1460.70	1.9	90.3
Mobile combustion - aviation	CO₂	1015.99	1.3	91.7
Emissions from substitutes for ozone depleting substances	HFCs	741.56	1.0	92.6
Emissions from manure management	CH₄	739.48	1.0	93.6
Fugitive emissions from oil and gas operations	CO₂	650.24	0.8	94.4
Emissions from cement production	CO₂	568.68	0.7	95.2