Table A1.1: (table 7.A1 from Good Practice Guidance) showing results of the key category level analysis for 99 per cent of the total emissions and removals in 2005

Key categories are those that comprise 95 per cent of the total

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(a) Tier 1 Category Level Assessment - including LULUCF
IPCC Categories	Gas	2005 estimate Gg	Level assessment	Cumulative total
Forest land remaining forest land	CO₂	26,767.89	24.9	24.9
Emissions from enteric fermentation in domestic livestock	CH₄	23,919.80	22.2	47.1
Mobile combustion - road vehicles	CO₂	12,444.08	11.6	58.7
Emissions from stationary combustion - gas	CO₂	7,589.75	7.1	65.8
Emissions from agricultural soils - animal production	N₂O	7,559.46	7.0	72.8
Emissions from stationary combustion - solid	CO₂	6,727.23	6.3	79.1
Indirect emissions from Nitrogen used in agriculture	N₂O	3,384.65	3.1	82.2
Emissions from stationary combustion - liquid	CO₂	3,128.98	2.9	85.1
Direct emissions from agricultural soils	N₂O	1,762.87	1.6	86.7
Emissions from the iron and steel industry	CO₂	1,662.00	1.5	88.3
Emissions from solid waste disposal sites	CH₄	1,460.70	1.4	89.7
Conversion to forest land	CO₂	1,254.72	1.2	90.8
Mobile combustion - aviation	CO₂	1,015.99	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
Fugitive emissions from oil and gas operations	CO₂	650.24	0.6	95.7
Emissions from cement production	CO₂	568.68	0.5	96.2
Emissions from Aluminium production	CO₂	554.86	0.5	96.7
Mobile combustion - Marine	CO₂	393.72	0.4	97.1
Emissions from ammonia/urea production	CO₂	346.19	0.3	97.4
Fugitive emissions from Oil and Gas operations	CH₄	320.85	0.3	97.7
Fugitive emissions from coal mining and handling	CH₄	305.99	0.3	98.0
Fugitive emissions from Geothermal operations	CO₂	300.81	0.3	98.3
Emissions from wastewater handling	CH₄	222.87	0.2	98.5
Emissions from Hydrogen production	CO₂	212.55	0.2	98.7
Emissions from wastewater handling	N₂O	163.56	0.2	98.8
Mobile combustion - Rail	CO₂	150.85	0.1	99.0

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