Environmental Impact of Beef Production Systems

Livestock production as a contributing factor of global warming has become a critical aspect of policy development among scientists, institutions, governments, and societies. Improving the animal farms performance in the several countries is a key strategy to meet the demand for animal protein, reducing greenhouse gas emissions, and improving resource use efficiency. In this context, this chapter presents a global overview of beef production systems, their diversity, the way they can contribute to major global environmental issues and the evaluation of specific points for intervention. The characteristics of the beef production systems all over the world are analyzed, together with the goal and scope, the types of analysis (methods for the evaluation of the carbon footprint), the functional units generally implemented for the analyses, the allocation methods, and the uncertainties of the studies. This detailed overview allows a critical analysis of the selected studies, which are discussed in the last section of the chapter. It was found that it is important to improve the understanding of biological processes involved in the emissions of methane and nitrous oxide processes, in order to obtain more valid and reliable carbon footprint results.