The carbon footprint of agriculture and the agri-food industry is one of the largest on the planet: agrifood systems generate around a third of global human-made greenhouse gas emissions, according to the FAO. Measuring and cutting it has become a priority for producers, cooperatives, processors and retailers.
What sets this sector apart is that much of its emissions are not CO2, but two far more potent gases: methane (CH4) and nitrous oxide (N2O), on top of land-use change. That is why the agri-food carbon footprint requires specific methods and careful accounting of greenhouse gases.
Why the agri-food sector is so emissions-intensive
Agri-food emissions have three main origins, each dominated by a different gas. Understanding them is the first step to measuring and reducing the footprint.
Methane (CH4) from livestock and rice
Enteric fermentation in ruminants (cattle, sheep, goats) and manure management release methane, a gas with a much higher warming potential than CO2 over the short term. Paddy rice grown under permanent flooding also emits methane, because waterlogged soils create anaerobic conditions. Livestock is in fact the single largest component of global agri-food emissions.
Nitrous oxide (N2O) from fertilisers
Applying synthetic and organic nitrogen fertilisers drives nitrous oxide emissions from the soil, a gas hundreds of times more potent than CO2 per unit of mass. Any nitrogen the crop does not take up is converted into N2O by microbial processes.
Land-use change
Converting forests, grasslands or wetlands into cropland or pasture releases the carbon stored in vegetation and soil. Deforestation linked to some supply chains is one of the biggest sources of food-system emissions, which is why origin traceability is now a central concern.
How the agri-food carbon footprint is measured
Measuring emissions in the field is more complex than in a factory, because variable biological processes are involved. The standard approach combines life cycle assessment with the product carbon footprint.
Life cycle assessment (LCA)
A life cycle assessment quantifies the environmental impacts of a food product across every stage: input production, farming, transport, processing, packaging, distribution, use and end of life. It is the methodological basis for comparing products and spotting emission hotspots.
Product carbon footprint (PCF)
The product carbon footprint (PCF) expresses the emissions tied to a specific unit (a litre of milk, a kilo of tomatoes, a pack of biscuits). It relies on standards such as ISO 14067 and on input- and process-specific emission factors. For the methodology, see our guide on what the product carbon footprint is and how it is measured.
The weight of scope 3 in food chains
For a processor or retailer, most emissions are not on their premises but upstream, in the farming and livestock of their suppliers. These are accounted for as scope 3, the category that usually concentrates most of a food company's footprint. Collecting primary data from thousands of farms is the sector's great challenge.
| Chain stage | Dominant gas | Main source |
|---|---|---|
| Crop production | N2O | Nitrogen fertilisers |
| Livestock | CH4 | Enteric fermentation and manure |
| Land-use change | CO2 | Deforestation and land clearing |
| Processing and cold chain | CO2 | Energy and refrigerants |
| Transport and distribution | CO2 | Fossil fuels |
Reduction levers
Cutting the agri-food footprint means acting in the field and in the factory at once. The main levers are:
- Nitrogen management: adjusting doses, splitting applications and using precision fertilisation to minimise N2O.
- Livestock management: improving animal diets, treating manure with anaerobic digestion and raising productivity per animal.
- Rice: alternating wetting and drying of the water layer to cut methane.
- Soil and carbon: regenerative farming, cover crops and reduced tillage that favour carbon storage.
- Zero deforestation: raw-material traceability to avoid land-use-change emissions.
- Energy and logistics: renewables in the plant, efficient refrigeration and optimised transport.
Many of these practices connect with the new GHG Protocol standard for the agri sector and CO2 removals, which defines how to account for land emissions and carbon removals.
Labelling and environmental declarations
Communicating the footprint in a verifiable way matters more and more for access to large retail and public procurement. The most common tools are product carbon footprint labels and environmental product declarations (EPD), third-party verified documents that report a food product's impact based on its LCA. The agricultural water footprint is usually reported alongside carbon, because water is the sector's other major environmental indicator.
Why measuring it is increasingly urgent
The pressure to know and reduce the agri-food footprint no longer comes only from environmental awareness, but from the market and the regulatory framework. Large retailers ask their suppliers for product-level emissions data to build their own scope 3 accounting, and many public tenders include environmental criteria that reward products with a lower footprint and verified declarations.
On top of that comes the EU deforestation regulation (EUDR), whose application was postponed to 30 December 2026 by Regulation (EU) 2025/2650 and which requires proof that commodities such as cocoa, coffee, soy, palm oil or timber do not come from deforested land, along with the growing accounting of land emissions and removals in international standards. An agri-food company that does not measure its footprint starts at a disadvantage: it cannot answer its customers' questionnaires, it loses access to the most demanding markets and it cannot see where its largest carbon costs sit. Measuring is a competitive advantage before it is a duty.
Frequently asked questions
Which gases weigh most in the agri-food footprint?
Methane from livestock and rice and nitrous oxide from fertilisers, plus CO2 from land-use change and energy use. Looking at CO2 alone is not enough.
Why is scope 3 so large in food?
Because most emissions occur in suppliers' farming and livestock, not in the processor's facilities. A food company's footprint is concentrated in its supply chain.
Is LCA useful for cutting emissions?
Yes. Life cycle assessment identifies which stages concentrate the impact, allowing reduction measures to be prioritised sensibly rather than acting blindly.
Measure the footprint of your food products with Manglai
Calculating the carbon footprint of every agri-food reference, with supplier data and rigorous emission factors, is work that technology can accelerate enormously. Manglai automates the calculation of the product footprint through life cycle assessment, so you can know, compare and reduce the emissions of your portfolio and respond to what clients and markets already demand.
