Publication - Research and analysis
Pig Sector Farmer-Led Climate Change Group: climate change and greenhouse gas evidence
Summary of existing evidence around the pig sector and greenhouse gases.
Annex: GHG Inventory Assumptions
Sources in the inventory have been attributed based on the following percentages:
| IPCC | Source Name | Crops | Dairy | Deer | Goats | Horses | Beef | Pigs | Poultry | Sheep |
|---|---|---|---|---|---|---|---|---|---|---|
| 3D11_Inorganic_nitrogen_fertilizers | Grass - Direct | 30% | 60% | 10% | ||||||
| 3D14_Crop_residues | Grass - Direct | 30% | 60% | 10% | ||||||
| 3H_Urea_application | Fertiliser Application | 80% | 10% | 10% | ||||||
| 1A4cii_Agriculture/Forestry/Fishing:Off-road | Agriculture - mobile machinery | 60% | 20% | 20% | ||||||
| 3A4_Enteric_Fermentation_other_livestock | Enteric | 7% | 1% | 67% | 25% | |||||
| 3G1_Liming - limestone | Liming | 50% | 15% | 30% | 5% | |||||
| 3G2_Liming - dolomite | Liming | 50% | 15% | 30% | 5% |
Other livestock includes emissions from deer, goats, horses, pigs, poultry, and other livestock. This results in the following estimates of GHG emissions for agriculture in 2018:
| Agricultural Sector |
Emissions in Inventory | Attributed based on expert input | Proportion attributed |
|---|---|---|---|
| MtCO2e | MtCO2e | % | |
| Beef | 2.97 | 0.47 | 16 |
| Arable/Crops | 1.02 | 0.59 | 58 |
| Dairy | 0.86 | 0.31 | 36 |
| Sheep | 0.99 | 0.05 | 5 |
| Other livestock | 0.20 | ..[3] | .. |
| -- Of which pigs | 0.09 | .. | .. |
| Uncategorised | 0.02 | .. | .. |
In 2018, emissions from other livestock were:
| Other livestock | MtCO2e | As % of Other livestock emissions | As % of Agriculture emissions |
|---|---|---|---|
| Pigs | 0.0863 | 43% | 1.16% |
| Other livestock | 0.0486 | 24% | 0.65% |
| Poultry | 0.0414 | 20% | 0.55% |
| Horses | 0.0249 | 12% | 0.33% |
| Deer | 0.0007 | 0% | 0.01% |
| Goats | 0.0004 | 0% | 0.01% |
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