Table 9. Comparison of Korean estimated GHG emissions from years 1990 and 2020 using 1996 GL, 2006 GL, and 2019 Refinement

Emission source		Year	1996 GL	2006 GL	2019 Refinement
CH4 enteric fermentation	Emission (Gg CO2-eq)	1990	2,935.69	4,221.50	4,945.68
		2020	4,673.00	6,828.19	8,055.12
	Trend	2020/1990 Ratio	1.6	1.6	1.6
		Annual change (%)	1.6	1.7	1.7
CH4 manure management	Emission (Gg CO2-eq)	1990	795.19	2,518.52	753.73
		2020	1,378.16	4,169.72	901.44
	Trend	2020/1990 Ratio	1.7	1.7	1.2
		Annual change (%)	1.9	1.7	0.6
N2O manure management	Emission (Gg CO2-eq)	1990	2,218.32	401.42	898.14
		2020	3,651.82	795.03	1,549.06
	Trend	2020/1990 Ratio	1.6	2.0	1.7
		Annual change (%)	1.7	2.3	1.8
Total emission	Emission (Gg CO2-eq)	1990	5,949.20	7,141.44	6,597.55
		2020	9,702.98	11,792.94	10,505.62
	Trend	2020/1990 Ratio	1.6	1.7	1.6
		Annual change (%)	1.7	1.7	1.6

Annual emission change was estimated using Compound Annual Growth Rate (CAGR) calculation to determine the increase rate each year during the specific period.