The agriculture industry raised a number of issues with the video. However, the lack of concrete evidence to back up Burger King’s claims was the most concerning. Burger King cites research from the Universidad Nacional Autónoma de México which indicates that feeding cows 100g of lemon-grass leaves per day will reduce methane emissions by 33% over the period the diet is fed. However, this research has not yet been peer-reviewed nor published. Furthermore, a similar study lead by Dr. Ermias Kebreab from the University of California, Davis, found inconclusive preliminary results
A number of other studies have looked at alternative cattle feed additives to reduce methane emissions as well. For example, Dr. Ermias Kebreab has seen encouraging results from his experiments of adding seaweed to cattle feed. Dr. Karen Beauchemin, a livestock specialist with Agriculture and Agri-Food Canada, has seen promising emission reductions from increasing dietary fat with crushed oilseeds, and by adding commercial active dried yeast products to feed. Here at the U of S, researchers have seen preliminary emission reductions from cattle feeding on ‘non-bloat legumes’. Yet, although the addition of these various feed additives may help create a sustainable nutrition plan for cows, the research is unable to confirm this as of yet.
Another element of the video that raised red flags for farmers and scientists alike was the focus on cow farts. As tweeted by Dr. Frank Mitloehner from UC Davis: “ITS. NOT. THE. COW. FARTS.” In reality, only 5-10% of methane emissions come from cow manure and flatulence. The remaining 90-95% are released from cows’ mouths. The methane released through cow burps is a by-product of enteric fermentation, a digestive process in which sugars are converted into simpler molecules.
Other concerns focused on the portrayal of the agriculture industry and beef farmers individually. Images of children wearing gas masks and melting polar ice caps depict the industry as damaging to the environment and contributing quite substantially to global-warming. We know that agriculture is a contributor to GHG emissions, yet, in both Canada and the U.S., agriculture accounts for only about 10% of total emissions, of which roughly 44% is methane from livestock. Additionally, the inclusion of a brief scene featuring a foolish, flatulent old farmer plays into old stereotypes the industry has been working for years to overcome. Overall, the video did not paint a pretty (or accurate) picture of agriculture or the hard-working farmers themselves.