Between 1961 and 2009, the world recorded a continued increase in the demand for meat, driven by the fast growth in population, economic improvement, changes in eating habits and rapid urbanization. This has resulted in improved livestock production that is projected to continue even into the future. However, raising animals for food has been identified as a major contributor to climate change. As more meat is produced to satisfy the increasing demand, it is important to understand its effect on climate change, which continues to be a threat to food security. Livestock production contributes...