New Study Challenges Environmental Claims of Grass-Fed Cows

A new study published in the Proceedings of the National Academy of Sciences challenges the environmental claims of grass-fed cows and bulls. The research found that grass-fed cows produce at least as many, if not more, planet-heating emissions as industrially raised counterparts. The study used a numerical model to simulate emissions, showing that grass-fed cows require more animals to produce the same amount of flesh as industrial systems, resulting in higher emissions per kilogram of protein.

Despite claims about improved welfare and local environmental benefits, the study's findings challenge the myth that grass-fed cows are a sustainable choice for those concerned about the climate crisis. Another study from 2023 also found that grass-fed beef is more carbon-intensive than grain-fed bulls, even when accounting for potential soil carbon sequestration from grazing. These findings suggest that grass-fed cows may not be a more environmentally friendly option as previously believed.