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Emissions from the agriculture sector account for approximately 6 billion tons, or 12%, of annual global anthropogenic CO2e. If left unchecked, global emissions in this sector are projected to increase to 7.25 billion tons annually by 2020, contributing significantly to rising CO2e emissions that lead to dangerous climate change.
Emissions from the agriculture sector account for approximately 6 billion tons, or 12%, of annual global anthropogenic CO2e. If left unchecked, global emissions in this sector are projected to increase to 7.25 billion tons annually by 2020, contributing significantly to rising CO2e emissions that lead to dangerous climate change.
Fertilizers and other tillage practices that release nitrous oxide gases (potent greenhouse gases) account for the largest share of CO2e in the sector, approximately 6% of global annual emissions. The second largest source of emissions is livestock and manure, with methane emissions that contribute more than 5% of global annual CO2e emissions.
Reduction in output in this sector is not an option given growing world demand. If demand for livestock-products continues to rise as current, global meat production is projected to more than double by 2050, becoming the driving force behind most of the world's deforestation and land degradation. Over a billion of the poorest people in the world rely on the agricultural industry for their livelihoods, which makes it difficult to impose sanctions, or taxes, on many farmers without threatening their livelihood. Low-carbon innovation is needed.
There is potential to transform agriculture into an efficient and sustainable source of income for a large fraction of the world's population through the dissemination of new farming techniques. Mitigation opportunities in this sector could technically save as much as 6 billion tons of CO2e annually by 2030 according to the IPCC.
There is potential to transform agriculture into an efficient and sustainable source of income for a large fraction of the world's population through the dissemination of new farming techniques. Mitigation opportunities in this sector could technically save as much as 6 billion tons of CO2e annually by 2030 according to the IPCC.
Mitigation at this level represents approximately a 12% reduction in annual anthropogenic CO2e emissions from 2009 levels. Achieving these reductions by 2020 hinges on the ability to accelerate the use of low-carbon technologies. Incentives to support low-carbon approaches to agricultural, as well as technology and knowledge transfer are important components.
The largest opportunities for emissions reduction in the agricultural sector are in the areas of cropland and grazing land management. Restoration of cultivated organic soils and degraded lands are also excellent opportunities for mitigation.
Market-based Approaches
Farming approaches that enhance crop and livestock productivity while reducing CO2e emissions make attractive investments for farmers provided appropriate financing is available. Examples of cropland management techniques that reduce CO2e and enhance productivity, as reported by the IPCC, include enhanced crop varieties, extended crop rotations, and reductions in fallow (unplanted) land.
The sale of enhanced crop varieties is a business opportunity in global agricultural markets. Reduced and more efficient use of fertilizer can decrease N2O emissions and save money. Business models that sell application or management technology to reduce fertilizer use could be important. Bioenergy from crops or residues could further reduce emissions, while generating valuable energy. Another example of energy production that reduces CO2e emissions is methane capture, from manure and other sources, for biogas.
Ancillary benefits to society of new farming practices include reduced pollution from farming and increased biodiversity. Capturing these public benefits into individual decision-making, however, may require concerted regulatory action.

Mitigation potential in agriculture is estimated to be as much as 20 billion tons of CO2e annually by 2030 according to the IPCC...
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Rice cultivation is a source of nitrous oxide gases (potent greenhouse gases) that are responsible for a large share of annual CO2e emissions. Rice cultivation is growing globally...
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Methane (CH4) emissions from cows, other livestock and manure contribute over 5% of global CO2e emissions...
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Economic potential for CO2e mitigation in agriculture is significant for a range of carbon prices...
Read more > Source: IPCC, 2007
Methane, predominantly from agriculture and waste management, accounts for 16% of global CO2e emissions...
Read more > Source: IEA, 2009