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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

(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