Climate change mitigation and the preservation of antibiotics effectiveness are two of today’s greatest public policy challenges. Each call for a similar measure, wherefore they should be considered in a joint perspective:
First, the looming threat of climate change calls for concerted action. Among the vast array of different measures, reducing methane emissions from farm animals could make a great contribution. Also, the pressure to convert land to produce food for animals reduces the availability of carbon sinks. Thus, reducing demand for animal feedstock can contribute to climate change mitigation efforts.
Second, the routine use of antimicrobials/antibiotics for increasing animal growth or preserving animal health is likely to lead to the to the development of infections resistant to antibiotics treatment in humans1. While the case for banning the use of antibiotics for maximising animal growth is particularly strong, there are also good arguments for further restricting its use even for preserving animal health. Antibiotics have been the „wonder drugs“ of the 20th century, saving immeasurable lives. Yet, today their effectiveness is becoming more and more diminished due to the development of resistant bacteria strains. Trading human health off for animal health is problematic. Even more, in today’s industrialised farming the living conditions of animals are often dismal, necessitating the standard use of antibiotics in the first place. If farm animals had more decent lives, the need for antibiotics would decline. This is reflected in the limitations on the use of antibiotics in organic agriculture2.
By looking at the joint benefits of policy responses to these problems, the argument base for taking action to address any of them is broadened and the costs calculus changes:
If antimicrobials use on animals were rigorously restricted, it would have strong implications for the dairy and meat industry. Animals couldn’t be crowded together as extremely as they are today, thus reducing feedstock input and methane emissions output per land unit. Feedstock is often sourced from abroad, the demand for which is adding pressure to turn more biodiverse and CO2 storing land into agricultural land. Letting cows graze on grassland is associated with lower emission than intensive grain feeding3. Thus, under the assumption that not simply more land will be used for putting animals on the pasture or in the barn, limiting animal antibiotics use can have a double climate policy benefit: less methane and less pressure to convert land for feedstock supply.
Happy cows, healthier humans, and a more stable climate: restricting the use of antibiotics on animals can support all of this.