Type

The substance or link of emissions

The sources of emissions

Direct emissions

CH₄

Anaerobic decomposition of organic matter such as crops, livestock’s fodder and manure and others, and livestock enteric fermentation emissions.

N₂O

Microbial decomposition of nitrogen in soil and manure, and nitrogen-rich fertilizer use.

CO₂

Aerobic decomposition of organic soil (e.g., moisture, peatland and marshes, etc.), crop straw burning, forest fires, and barren hill and wasteland grass burning.

Indirect emissions

Link of agricultural inputs

The use of fertilizers, pesticides, herbicides, films and machinery as well as agricultural irrigation, farmland construction, installation-agricultural development and others need all to consume a large amount of natural resources and fossil fuels, resulting in indirect GHG emissions.

Link of agricultural outputs

The transport, storage, processing and others of agricultural products need to consume a large amount of natural resources and fossil fuels, resulting in indirect GHG emissions.

Land use structure change

The reclamation of woodland and grassland into arable land reduces the ability of agricultural carbon reduction, indirectly increasing GHG emissions.