Meat & Poultry

Material Composition Assumptions

Meat and poultry is the most carbon-intensive major food category in the retail market. The CCI score of 12.0 kgCO2e/kg represents a production-weighted average across the three dominant globally traded meat categories: beef (~60 kgCO2e/kg at median, global production ~71 million tonnes/year), pork (~7.6 kgCO2e/kg, ~121 million tonnes/year), and chicken (~6.9 kgCO2e/kg, ~100 million tonnes/year). The weighted average reflects global production volumes and skews toward pork and chicken — which together account for approximately 75% of global meat production by volume — while the high unit footprint of beef lifts the average substantially.

Key material and system inputs include:

• Feed: The largest physical input to all livestock systems. An average broiler chicken requires approximately 1.7–2.0 kg of feed per kg of live weight (feed conversion ratio, FCR, of ~1.7). Pigs have an FCR of ~2.5–3.0. Beef cattle in feedlot systems have FCRs of 6–10 kg of grain-equivalent per kg of gain; grass-fed beef systems require 20–40 kg of dry matter per kg of gain. Feed is predominantly soy meal and corn (USA, Brazil) or barley and wheat (EU).
• Pasture and rangeland: Extensive beef cattle systems graze on pasture, with minimal purchased feed inputs, but require large land areas per unit of output. Pasture-to-beef conversion is the most land-intensive food production pathway.
• Water: Beef has the highest freshwater footprint of any major food — approximately 15,000 litres per kg of boneless beef at global average, driven primarily by feed crop irrigation and on-farm drinking water.
• Veterinary inputs, growth promoters: Minor direct emission contributors but relevant for organic vs. conventional comparisons.
• Packaging: Vacuum-pack plastic (PA/LDPE laminate, ~30–50 g per kg retail product), modified atmosphere packaging trays (EPS or PP tray with barrier film), and retail wrapping. Packaging adds approximately 0.2–0.5 kgCO2e/kg of finished meat product.
• Refrigeration chain: Cold storage at slaughterhouse, distribution warehouse, and retail is energy-intensive but represents a relatively small fraction of total lifecycle emissions compared to farm-level biogenic sources.

Why the Score Is What It Is

Meat’s very high footprint of 12.0 kgCO2e/kg weighted average (and particularly beef’s median of ~60 kgCO2e/kg) is fundamentally driven by the thermodynamic inefficiency of animal protein production: most feed energy is metabolised by the animal, exhaled as CO2 or heat, or excreted as waste rather than becoming meat. The biogenic emissions from this metabolic process — methane from ruminant digestion and manure — are climatically significant and structurally difficult to reduce without changing the production system.

Enteric fermentation and manure from beef cattle (~32% of weighted total, Scope 1) are the dominant hotspot. Beef cattle are ruminants; a beef cow emits approximately 70–90 kg of methane per year from digestion. Over a typical finishing period of 18–30 months (US feedlot) or 24–48 months (grass-fed), this accumulates to 100–200 kg of methane per animal, equivalent to 2,500–5,000 kgCO2e per animal. Divided across 200–400 kg of carcass weight, this yields an enteric emission factor of approximately 10–25 kgCO2e per kg of beef — before any feed or land-use change is added. Pork and chicken lack rumen systems and therefore have negligible enteric fermentation; this is the primary reason their footprints are 8–10 times lower than beef per kg.

Feed crop production (~30% of total, Scope 3) is the second-largest component. The feed supply chain for pork and poultry is the dominant emission source within those sub-categories, since enteric fermentation is negligible. Soy meal — primarily from Brazil and Argentina — is a key protein source for pork and poultry feed globally. Its lifecycle carbon includes the nitrous oxide from fertiliser application, transportation, and critically, any land-use change associated with soy expansion into Cerrado or Amazon biomes.

Land-use change (~18% of total, Scope 3) is a structural risk unique to the meat sector at scale. Both cattle ranching (direct LUC for pasture) and soy expansion for feed (indirect LUC) have historically driven significant tropical deforestation in Brazil. The Poore & Nemecek (2018) analysis suggests that Brazilian beef from deforested land can carry footprints of 100–200+ kgCO2e/kg — far above the global median. LUC emissions are typically excluded from corporate scope 3 reporting, making sector averages an underestimate of the true climate impact in deforestation-risk contexts.

Manure management for pork and poultry (~14% of Scope 1) involves methane and N2O from stored slurry in anaerobic conditions. Concentrated animal feeding operations (CAFOs) in the USA and intensive pork production in China generate large volumes of slurry requiring treatment. Covered lagoons with biogas capture are the most effective mitigation, but remain less common than open-air lagoon systems.

Processing, refrigeration, and packaging (~6% of Scope 2) — though significant in absolute terms — are modest relative to the biological emissions dominating the total.

What Drives Variation

Species creates the largest source of variation within the category — a factor of 5–10x between chicken/pork and beef. Switching from a beef-heavy to a chicken-heavy protein mix is the most carbon-effective dietary shift within the meat category.

Production system is the second-largest driver. Intensive feedlot beef (USA, Australia) uses high-FCR grain feeding over a shorter period: lower land use per kg of output but higher grain supply chain Scope 3. Extensive grass-fed beef uses less grain but more land per kg of output and potentially longer methane-producing life per animal. Neither system is clearly lower-carbon across all contexts; it depends critically on whether pasture is on marginal or cleared land and what the methane accounting methodology assumes.

Country of origin and deforestation risk is the most extreme source of variation. Brazilian beef from areas with recent deforestation carries footprints 5–10x higher than EU-origin beef from stable agricultural land. The EU Deforestation Regulation (EUDR) — requiring due diligence documentation for beef, soy, and other commodities — is driving traceability investment in supply chains.

Feed composition in pork and poultry systems directly affects the Scope 3 component. Feed using certified deforestation-free soy (RTRS, ProTerra certified) can reduce the upstream LUC risk substantially. EU pork producers have largely transitioned to certified soy sourcing under Feed Responsible Sourcing standards.

Slaughterhouse and processing energy varies with facility scale and grid intensity. Large-scale processing plants with heat recovery, on-site biogas from offal, and renewable electricity supply can reduce Scope 2 intensity by 50–80% relative to older facilities.

Organic certification does not consistently reduce the lifecycle carbon footprint of meat — organic beef, for example, typically grows more slowly, has a longer methane-producing lifespan, and requires more pastureland per kg of output, often resulting in a higher or similar per-kg footprint relative to conventional feedlot systems.

Manufacturing Geography

Global meat production is concentrated in a small number of high-volume producing countries. China is the world’s largest pork producer (~55% of global supply). USA leads in broiler chicken and feedlot beef. Brazil is the world’s largest beef exporter, with approximately 200 million cattle and ongoing deforestation pressure. EU is a major pork and poultry producer for domestic markets; Australia is a significant beef exporter, particularly to Asia.

Processing infrastructure (slaughterhouses, cutting plants, cold chain) is predominantly located near production — a structural requirement for food safety reasons. Beef is traded internationally as chilled or frozen primals; poultry and pork are traded both as whole carcasses and further-processed products.

Grid intensity at slaughterhouse and processing facilities: US average ~390 gCO2e/kWh, EU ~300 gCO2e/kWh, Brazil ~220 gCO2e/kWh (predominantly hydroelectric), Australia ~580 gCO2e/kWh (declining with renewable buildout).

Provenance Override Guidance

Meat producers, processors, and retailers can override the default CCI score using:

1. Farm-level LCA data per production system — particularly species, breed, FCR, manure system type, and pasture management. US beef producers can use the National Cattlemen’s Beef Association’s environmental footprint data; EU producers can use standardised LEAP (Livestock Environmental Assessment and Performance) tool outputs from FAO.
2. Feed audit specifying concentrate type, soy origin and certification status, and feeding duration — critical for deforestation risk assessment.
3. Slaughterhouse and processing energy data per tonne of carcass weight, with grid emission factor and renewable energy documentation.
4. Deforestation-free supply chain documentation per FAO EUDR requirements — geo-referenced farm polygon data linked to satellite deforestation monitoring.
5. Country of origin documentation enabling substitution of region-specific emission factors from FAO GLEAM rather than global weighted averages.

Methodology Notes

• CCI score of 12.0 kgCO2e/kg represents a production-weighted average across beef (~60 kgCO2e/kg median), pork (~7.6 kgCO2e/kg), and chicken (~6.9 kgCO2e/kg), weighted by approximate global production volumes. The score excludes land-use change emissions, which would be additive and can be very large for deforestation-risk supply chains.
• Scope breakdown: Scope 1 (enteric fermentation, manure management) dominates at ~46% (5.5 kgCO2e), reflecting the biogenic nature of farm-level emissions. Scope 3 (feed supply, LUC risk, packaging, logistics) is ~50% (6.0 kgCO2e). Scope 2 (processing electricity) is ~4% (0.5 kgCO2e). Note: in practice, LUC emissions in Scope 3 can dramatically alter this distribution for deforestation-linked supply chains.
• Functional unit: One kilogram of retail meat product (weighted average across beef, pork, and chicken at approximate global production mix), cradle-to-gate at processing facility (cold chain distribution and retail excluded).
• Confidence is medium: Farm-level emission factors for ruminants are well-characterised (IPCC Tier 2/3 approaches) but the weighting across species, production systems, and regions introduces significant uncertainty. LUC risk is explicitly excluded and is additive.