The livestock sector is responsible for a substantial share of greenhouse gas emissions. Therefore, it is very important to evaluate possible options to reduce the environmental impact of livestock farming. This study, assesses te effects of changes in consumption and production, using two different economic models. The final impact of those changes was often found to be less than the theoretical direct effect, due to feedbacks in the agricultural system.
This is the first systematic comparison of two global agro-economic models in the scientific literature. Substantial differences between model results arose from the specific implementation of trade, technology and land. Therefore, further model intercomparisons and data harmonisation would be desirable.