Publication - Research and analysis

Pig Sector Farmer-Led Climate Change Group: climate change and greenhouse gas evidence

Published: 20 Dec 2021

Summary of existing evidence around the pig sector and greenhouse gases.

Pig Sector Farmer-Led Climate Change Group: climate change and greenhouse gas evidence
Annex: GHG Inventory Assumptions

Annex: GHG Inventory Assumptions

Sources in the inventory have been attributed based on the following percentages:

Table C1: Emission source attribution
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:

Table C2: Estimates of GHG emissions for agriculture, 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:

Table C3: Estimates of GHG emissions from other livestock, 2018
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%

Contact

Email: are.futureruralframework@gov.scot