Can We Cut Emissions While Maintaining Efficiency? Meet the Innovative European Cows That Could Transform Agriculture and Combat Climate Change

European breeding today faces a major challenge. Cattle are among the largest emitters of greenhouse gases in the agricultural sector. Behind this observation, a question arises more and more often. What if the animal itself could evolve to respond to the climate emergency? A less polluting cow could well become one of the keys to more sustainable breeding, without sacrificing production.

Why do cows emit so much methane?

In Europe, cattle represent nearly 80% of methane emissions linked to agriculture. This greenhouse gas, with a warming power 25 times greater than that of CO2, is produced largely during the digestion of ruminants. An average dairy cow releases around 118 kg of methane per year according to INRAE, the equivalent of a ton of CO2. Enteric fermentation thus constitutes a significant loss of energy for the animal, up to 12% of the energy ingested.

These emissions are all the more significant as food rations are rich in poorly digested fiber. Intensive forage systems, based on corn and concentrates, partially reduce these losses but increase other environmental impacts. Dairy farming alone represents nearly 6% of national greenhouse gas emissions in France, and more than 30% of ammonia emissions.

Less polluting cow, better thought out ration

For several years, researchers have been exploring a different approach to limit emissions linked to livestock farming. They seek to select smaller cows, while maintaining a good level of milk production. Thus, the objective remains to reduce their impact without harming agricultural yields. In an experimental farm in Normandy, one of them is 50kg lighter than its peers and consumes less fodder without reducing its milk production. This characteristic leads to a direct reduction in methane emissions. This work was relayed on France Info on November 23, 2025.

This approach is accompanied by finer power management. By limiting excessive protein intake and promoting combinations of grasses and legumes, breeders reduce nitrogen losses, particularly in the form of urea. This type of ration makes it possible to better utilize the nitrogen ingested, limiting gaseous emissions and losses to the soil. A less polluting cow is therefore not only a question of genes, but also of more sustainable feeding practices.

The results of an analysis carried out on 206 French dairy farms show that predominantly grassland systems with a significant proportion of meadows in the crop rotation present better environmental efficiency, both in terms of emissions and biodiversity.

Political tools to support the transition

In the background of these innovations there is an agricultural policy issue. Since 2013, the Common Agricultural Policy has integrated agri-environmental and climate measures to encourage the maintenance of permanent grasslands. These surfaces play an essential role in storing carbon, provided they are not turned over too frequently and a reasonable animal density is maintained.

Grasslands, in addition to promoting biodiversity, allow better carbon sequestration than systems based on corn. The study coordinated by Jean-Baptiste Dollé highlights that the conversion of temporary meadows into permanent meadows increases carbon stock and helps to offset part of the emissions linked to livestock farming.

Reducing methane emissions linked to cattle involves several levers, both genetic, dietary and agronomic. However, this development cannot succeed without an adaptation of existing agricultural policies. For the less polluting cow to become a reality in Europe, technical support remains essential. In addition, a fundamental reflection on aid and production models must accompany this transition.