Soil organic matter
Worldwide, agriculture is responsible for between 11 and 30 percent of greenhouse gas emissions, depending on the boundaries and methodologies used to determine its emissions. According to the United Nations Environment Programme, the estimates of global greenhouse gas emissions in 2010 were 50.1 gigatons of carbon dioxide equivalent (Gt CO2e) per year. To keep global mean temperature increases below 2°C compared to pre-industrial levels, GHG emissions will have to be reduced to a median level of 44 Gt CO2e in 2020.
SOM (soil organic matter) is composed largely of carbon that is captured as CO2 from the air by plants through photosynthesis. Published, peer-reviewed meta-studies show that organic farming systems are superior to conventional systems in capturing CO2 from the atmosphere (the primary greenhouse gas responsible for climate change) and sequestering it into the ground as SOM.