Table 5. Emission factor (EF) to calculate CH
4
emissions from enteric fermentation
Animal Category
EF (kg CH
4
/head/year)
1996 GL
2006 GL
2019 Refinement
Dairy cattle
118
121
138
Hanwoo cattle
47
53
64
Beef cattle
47
53
64
Swine
1.5
1.5
1.5
Chicken layer
0
0
0
Chicken broiler
0
0
0
Duck
0
0
0
Data from IPCC [
10
], IPCC [
12
], and IPCC [
13
].