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Table A1.3: (table 7.A2 from Good Practice Guidance) showing results of the key category trend 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.

(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 21,806.54 23,919.80 0.034 17.6 17.6
Mobile combustion - road vehicles CO2 7,535.48 12,444.08 0.032 16.5 34.0
Emissions from stationary combustion - solid CO2 3,227.01 6,727.23 0.028 14.6 48.6
Emissions from stationary combustion - gas CO2 7,691.14 7,589.75 0.021 10.8 59.4
Emissions from solid waste disposal sites CH4 2,122.92 1,460.70 0.012 6.4 65.8
Direct emissions from agricultural soils N2O 475.16 1,762.87 0.012 6.3 72.1
Forest land remaining forest land CO2 20,624.90 26,767.89 0.011 5.7 77.8
Emissions from agricultural soils - animal production N2O 6,856.67 7,559.46 0.010 5.3 83.2
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 1,254.72 0.002 0.9 95.3
Fugitive emissions from geothermal operations CO2 357.34 300.81 0.002 0.8 96.1
Mobile combustion - marine CO2 247.82 393.72 0.001 0.5 96.5
Emissions from wastewater handling CH4 222.93 222.87 0.001 0.3 96.8
Mobile combustion - road vehicles N2O 64.41 134.94 0.001 0.3 97.1
Mobile combustion - rail CO2 77.50 150.85 0.001 0.3 97.4
Mobile combustion - aviation CO2 772.83 1,015.99 0.001 0.3 97.7
Emissions from stationary combustion - liquid CO2 2,546.55 3,128.98 0.000 0.2 97.9
Mobile combustion - road vehicles CH4 69.00 51.76 0.000 0.2 98.1
Grassland remaining grassland CH4 57.36 37.82 0.000 0.2 98.3
Fugitive emissions from coal mining and handling CH4 272.13 305.99 0.0003 0.18 98.5
Non-CO2 emissions from stationary combustion N2O 75.78 123.91 0.000 0.2 98.7
Emissions from lime production CO2 81.62 128.60 0.000 0.1 98.8
Conversion to settlement CO2 97.16 97.16 0.0002 0.13 98.9
Emissions from hydrogen production CO2 152.29 212.55 0.000 0.12 99.0