Food systems generate 33% of all human-caused greenhouse-gas emissions, and livestock accounts for 14.5% of global anthropogenic emissions. Industrial output has scaled fast, including 133.8 million tonnes of poultry meat produced in 2020 and a poultry market valued at about $225 billion in 2023. Tracing emissions and habitat conversion through antibiotics and biodiversity loss shows how intensified production multiplies harms beyond the barn.
Key Takeaways
- 20% of global greenhouse-gas emissions come from food systems, including land-use change related to agriculture, and the report notes that livestock is a major contributor within this sector
- 33% of all human-caused greenhouse-gas emissions are associated with food systems, as summarized in FAO’s assessment of greenhouse-gas emissions by sector
- 14.5% of global anthropogenic greenhouse-gas emissions are from livestock (including supply chain), according to the most-cited FAO estimate
- Global beef production was 58.7 million tonnes in 2022, reflecting intensive cattle supply chains
- In 2020, global poultry meat production was 133.8 million tonnes, demonstrating high-throughput industrial broiler systems
- In 2018, the global aquaculture sector produced 82.1 million tonnes (live weight), which competes with and complements intensive feed systems for livestock and thus affects intensification pressures
- In Denmark, antibiotic consumption in pig and cattle production decreased by more than 60% between 2009 and 2018 under the Yellow Card program
- A 2020 systematic review found that intensive livestock production is associated with higher prevalence and abundance of antibiotic resistance genes in farm environments
- Globally, the OECD and FAO estimate that 90% of antibiotics used are used in food animals (including aquaculture), though this is contested; the estimate is widely cited from their analysis
- In 2019, the European Union banned the routine use of antibiotics for growth promotion in animal production across member states
- Since January 1, 2022, the EU requires antimicrobial use in animals to be recorded and that certain sales and use data be submitted under strengthened harmonized monitoring rules
- In the EU, Directive 98/58/EC sets minimum standards for the protection of animals kept for farming purposes, including that they must be maintained in conditions suited to their needs
- Food and Agriculture Organization (FAO) estimates global food waste at 14% of food lost before reaching the retail stage in 2019
- Global meat demand is projected to rise by 14% from 2018 to 2027 according to OECD-FAO Agricultural Outlook 2019–2028 baseline (used for 2018–2027 window)
- In 2022, the global meat market size was valued at approximately $1.0 trillion, reflecting the scale of high-volume industrial meat supply chains
Food systems drive a major share of emissions, with livestock behind much of greenhouse gases, land loss, and biodiversity impacts.
Related reading
01 · Category
Environmental Impact6 stats
01
20% of global greenhouse-gas emissions come from food systems, including land-use change related to agriculture, and the report notes that livestock is a major contributor within this sectorhttps://www.ipcc.ch/report/ar6/wg3/downloads/report/IPCC_AR6_WGIII_FullReport.pdf
02
33% of all human-caused greenhouse-gas emissions are associated with food systems, as summarized in FAO’s assessment of greenhouse-gas emissions by sectorhttps://www.fao.org/3/i3537e/i3537e.pdf
03
14.5% of global anthropogenic greenhouse-gas emissions are from livestock (including supply chain), according to the most-cited FAO estimatehttps://www.fao.org/3/a0701e/a0701e00.htm
04
74% of the world’s agricultural land is used for livestock, including crops used as feed and the land used for grazinghttps://www.fao.org/3/a0701e/a0701e.pdf
05
15 million hectares of forest are converted each year into agricultural land globally, driven primarily by land expansion for crops and livestock productionhttps://www.worldwildlife.org/threats/deforestation-and-forest-degradation
06
A review in Science found that livestock supply chains are a leading driver of biodiversity loss, with habitat conversion associated with intensive animal productionhttps://science.sciencemag.org/content/356/6335/eaam4409
Interpretation
Environmental Impact Interpretation
Factory farming is a major driver of environmental harm, accounting for roughly 33% of human caused greenhouse gas emissions from food systems and using 74% of agricultural land for livestock, which in turn accelerates land conversion that threatens forests and biodiversity.
02 · Category
Production & Scale3 stats
01
Global beef production was 58.7 million tonnes in 2022, reflecting intensive cattle supply chainshttps://www.fao.org/3/cc0489en/cc0489en.pdf
02
In 2020, global poultry meat production was 133.8 million tonnes, demonstrating high-throughput industrial broiler systemshttps://www.fao.org/documents/card/en/c/cb0898en
03
In 2018, the global aquaculture sector produced 82.1 million tonnes (live weight), which competes with and complements intensive feed systems for livestock and thus affects intensification pressureshttps://www.fao.org/3/ca8213en/ca8213en.pdf
Interpretation
Production & Scale Interpretation
Across production and scale, industrial animal systems are delivering large outputs such as 58.7 million tonnes of global beef in 2022 and 133.8 million tonnes of poultry meat in 2020, while aquaculture also reached 82.1 million tonnes in 2018, underscoring how heavily factory farming relies on high-throughput supply chains to meet demand.
03 · Category
Antibiotics & Resistance4 stats
01
In Denmark, antibiotic consumption in pig and cattle production decreased by more than 60% between 2009 and 2018 under the Yellow Card programhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC6462900/
02
A 2020 systematic review found that intensive livestock production is associated with higher prevalence and abundance of antibiotic resistance genes in farm environmentshttps://www.sciencedirect.com/science/article/pii/S0160412020304205
03
Globally, the OECD and FAO estimate that 90% of antibiotics used are used in food animals (including aquaculture), though this is contested; the estimate is widely cited from their analysishttps://www.oecd.org/health/health-systems/antimicrobial-resistance.htm
04
The ECDC/EFSA 2023 summary reports that resistance is widespread in key zoonotic bacteria, including Campylobacter and Salmonella, which are relevant to food animal supply chainshttps://efsa.onlinelibrary.wiley.com/doi/epdf/10.2903/sp.efsa.2023.EN-786
Interpretation
Antibiotics & Resistance Interpretation
Across the antibiotics and resistance landscape, countries like Denmark cut antibiotic use in pig and cattle production by more than 60% from 2009 to 2018, yet research still links intensive livestock production to higher antibiotic resistance and major agencies report that 90% of antibiotics are used in food animals while resistance in zoonotic bacteria like Campylobacter and Salmonella remains widespread.
More related reading
04 · Category
Regulation & Compliance5 stats
01
In 2019, the European Union banned the routine use of antibiotics for growth promotion in animal production across member stateshttps://eur-lex.europa.eu/eli/reg/2003/1831/oj
02
Since January 1, 2022, the EU requires antimicrobial use in animals to be recorded and that certain sales and use data be submitted under strengthened harmonized monitoring ruleshttps://eur-lex.europa.eu/eli/reg/2019/6/oj
03
In the EU, Directive 98/58/EC sets minimum standards for the protection of animals kept for farming purposes, including that they must be maintained in conditions suited to their needshttps://eur-lex.europa.eu/eli/dir/1998/58/oj
04
In California, the Prevention of Cruelty to Animals Act for factory farms includes a requirement for hens to be provided with space and care under the 2018 regulations culminating in cage ban implementation milestoneshttps://leginfo.legislature.ca.gov/faces/billTextClient.xhtml?bill_id=2017-2018&chapter=870
05
In the EU, Regulation (EC) No 1099/2009 harmonizes rules for the protection of animals at the time of killing, affecting slaughter practices across intensive supply chainshttps://eur-lex.europa.eu/eli/reg/2009/1099/oj
Interpretation
Regulation & Compliance Interpretation
Across Regulation and Compliance, a clear trend is tightening controls on farmed animals with the EU banning routine antibiotic growth promotion in 2019 and then requiring from January 1, 2022 that antimicrobial use be recorded and related sales and use data be reported.
05 · Category
Economics & Supply Chains4 stats
01
Food and Agriculture Organization (FAO) estimates global food waste at 14% of food lost before reaching the retail stage in 2019https://www.fao.org/3/ca6030en/ca6030en.pdf
02
Global meat demand is projected to rise by 14% from 2018 to 2027 according to OECD-FAO Agricultural Outlook 2019–2028 baseline (used for 2018–2027 window)https://www.oecd.org/agriculture/agricultural-outlook/2030-agricultural-outlook.htm
03
In 2022, the global meat market size was valued at approximately $1.0 trillion, reflecting the scale of high-volume industrial meat supply chainshttps://www.imarcgroup.com/meat-market
04
The global poultry meat market was valued at about $225 billion in 2023 (as reported by trade and market research aggregators)https://www.grandviewresearch.com/industry-analysis/poultry-meat-market
Interpretation
Economics & Supply Chains Interpretation
With global meat demand projected to grow 14% from 2018 to 2027 and the industry already reaching about $1.0 trillion in 2022, economics and supply chains for factory farming are under pressure to expand industrial output while also addressing how 14% of food is wasted before it even reaches retail.
report visual · Comparison
Food systems’ climate footprint and livestock’s role
Food systems account for a large share of human-caused greenhouse-gas emissions, with livestock contributing a substantial portion within that sector.
33% of all human-caused greenhouse-gas emissions are associated with food systems, as summarized in FAO’s assessment of 33%
20% of global greenhouse-gas emissions come from food systems, including land-use change related to agriculture, and the
20%
14.5% of global anthropogenic greenhouse-gas emissions are from livestock (including supply chain), according to the mos
14.5%
source-verifiedfao.org · ipcc.ch
Reference
Cite This Report
This report is designed to be cited. We maintain stable URLs and versioned verification dates. Copy the format appropriate for your publication below.
APA
Sophie Moreland. (2026, February 13). Factory Farming Statistics. Gitnux. https://gitnux.org/factory-farming-statistics
MLA
Sophie Moreland. "Factory Farming Statistics." Gitnux, 13 Feb 2026, https://gitnux.org/factory-farming-statistics.
Chicago
Sophie Moreland. 2026. "Factory Farming Statistics." Gitnux. https://gitnux.org/factory-farming-statistics.
Sources & references
22 datasets cited across this report
+10 additional datasets cited (not shown individually)