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Table 1.5.3 Key category analysis for the 2004 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 2004 estimate Gg Trend assessment Contribution to trend Cumulative total

Mobile combustion - road vehicles

CO2

7534.65

12416.93

0.036

18.5

18.5

Emissions from enteric fermentation in domestic livestock

CH4

21553.97

23714.98

0.027

13.7

32.1

Emissions from stationary combustion - gas

CO2

7679.40

7031.32

0.025

12.9

45.0

Emissions from stationary combustion - solid

CO2

3227.01

5808.96

0.021

10.7

55.7

Direct emissions from agricultural soils

N2O

476.05

1806.29

0.014

6.9

62.6

Emissions from solid waste disposal sites

CH4

2179.23

1509.12

0.013

6.4

69.0

Forest land remaining forest land

CO2

20624.90

26254.43

0.014

7.0

76.0

Emissions from agricultural soils - animal production

N2O

6767.81

7248.77

0.011

5.4

81.4

Emissions from substitutes for ozone depleting substances

HFCs

0.00

597.36

0.007

3.4

84.8

PFCs from aluminium production

PFC

515.60

80.70

0.006

3.1

87.8

Emissions from stationary combustion - liquid

CO2

2546.55

2755.47

0.004

1.9

89.7

Conversion to forest land

CO2

870.01

747.94

0.003

1.7

91.4

Fugitive emissions from oil and gas operations

CO2

263.75

602.86

0.003

1.6

93.0

Mobile combustion - aviation

CO2

772.83

1192.23

0.003

1.4

94.5

Fugitive emissions from geothermal operations

CO2

357.34

279.67

0.002

0.9

95.3

(b) Tier 1 category trend assessment - excluding LULUCF
IPCC categories Gas Base year estimate Gg 2004 estimate Gg Trend assessment Contribution to trend Cumulative total

Mobile combustion - road vehicles

CO2

7534.65

12416.93

0.0362

20.3

20.3

Emissions from enteric fermentation in domestic livestock

CH4

21553.97

23714.98

0.0268

15.0

35.3

Emissions from stationary combustion - gas

CO2

7679.40

7031.32

0.0252

14.1

49.4

Emissions from stationary combustion - solid

CO2

3227.01

5808.96

0.0209

11.7

61.1

Direct emissions from agricultural soils

N2O

476.05

1806.29

0.0136

7.6

68.7

Emissions from solid waste disposal sites

CH4

2179.23

1509.12

0.0125

7.0

75.7

Emissions from agricultural soils - animal production

N2O

6767.81

7248.77

0.0106

5.9

81.7

Emissions from substitutes for ozone depleting substances

HFCs

0.00

597.36

0.0066

3.7

85.4

PFCs from aluminium production

PFC

515.60

80.70

0.0060

3.4

88.7

Emissions from stationary combustion - liquid

CO2

2546.55

2755.47

0.0037

2.1

90.8

Fugitive emissions from oil and gas operations

CO2

263.75

602.86

0.0031

1.8

92.6

Mobile combustion - aviation

CO2

772.83

1192.23

0.0028

1.6

94.1

Fugitive emissions from geothermal operations

CO2

357.34

279.67

0.0017

1.0

95.1