The pollutant emission of livestock and poultry in the raising stage mainly comes from the pollutant emission of livestock and poultry gastrointestinal fermentation, and the pollutant emission generated by the energy consumption of livestock and poultry heating, lighting and equipment operation. Because of the different physiological structure of birds, the amount of CH4 produced in intestinal fermentation is very small, so it is ignored Please take note that this data is directly applicable to small scale retail pig farming and may not be entirely suitable for large scale commercial operations. When utilizing this data, it’s imperative to consider the specific variables measured, such as the feeding cycle, meat to feed ratio, feed formula, and the consumption of feed, coal, and electricity. Additionally, CH4 emissions from poultry are considered negligible and excluded. Data regarding fertilizers, electricity, and coal consumption should be cross-referenced with relevant statistical yearbooks and public records from national statistical agencies or agricultural departments for comprehensiveness and verification purposes.