Agricultural food production and agriculturally-related change in land use substantially contribute to greenhouse-gas emissions worldwide. Four-fifths of agricultural emissions arise from the livestock sector. Although livestock products are a source of some essential nutrients, they provide large amounts of saturated fat, which is a known risk factor for cardiovascular disease.
Friel, S., Gangour, A., Garnett, T., Lock, K., Chalabi, Z., Roberts, I., Bulter, A., BUTLER, C., Waage, J., McMichael, A., & Haines, A. (2009). Public health benefits of strategies to reduce greenhouse-gas emissions: food and agriculture. Lancet, 374(9706), 2016-2025. https://doi.org/10.1016/S0140-6736(09)61753-0