JBS’s methane emissions exceed those of any other company in the global meat and dairy sector, according to a report by Changing Markets. It is estimated by the report that JBS’s emissions surpass the total methane emissions from cattle in France, Germany, Canada, and New Zealand combined, or amount to 55% of the emissions from cattle in the United States.

An investigation by Repórter Brasil has shown that JBS has grain suppliers who produce in deforested areas of the Amazon and Cerrado. The investigation indicates that the company bought soy from farmers involved in deforestation in Mato Grosso to produce feed for its poultry farms. The study also traced sales from corn producers operating on irregular farms directly to JBS.

Cattle from the most deforested Indigenous land in Brazil supplied JBS, according to research by Repórter Brasil. The research indicates that animals raised on farms within the Apyterewa Indigenous Land in Pará were transferred to a second property with no environmental liabilities before being sold to the company. This practice, known as “cattle laundering,” allows animals with “dirty” origins to enter the market without being properly identified.

A technical analysis conducted by the Center for Climate Change Analysis (CCCA) shows that JBS’s meat supply to the Casino Group is linked to deforestation and violations of the rights of communities living within the Uru-Eu-Wau-Wau Indigenous Land in Rondônia (RO). The study identifies deforestation within the supply chain of three JBS-controlled meatpacking plants, totaling approximately 50,000 hectares of cleared forest—an area five times the size of the city of Paris. The analysis supports a lawsuit seeking to hold the French group accountable for potential environmental damage and for violations of the rights of Indigenous peoples and traditional communities in Brazil.

A farm located within the Itacaiúnas National Forest, in southeastern Pará, was part of the JBS production chain, according to a report by the Organized Crime and Corruption Reporting Project (OCCRP). The organisation indicates that the cattle were transferred to properties outside the protected area, which then supplied them directly to the company’s slaughterhouses.