This collection features five peer-reviewed literature reviews on the environmental impact of livestock production. The first chapter discusses life cycle assessment (LCA) and its role in evaluating the environmental footprint of farming systems. The chapter also explores how the practical trade-off between feasibility and scientific rigour should be addressed in the field of ruminant production systems. The second chapter explores some of the many facets of livestock's contributions to climate change and the difficulties involved in quantifying them, with a closer look into the contribution of livestock methane emissions to changing atmospheric methane concentrations over the last few decades. The third chapter presents a review of the environmental sustainability impacts of swine production, focused at the farm level because the majority of environmental impacts occur by this stage of the supply chain. The fourth chapter considers the potential strategies that can be implemented to improve the environmental performance of intensive poultry systems. The final chapter examines how LCA can be used as a tool to quantify multiple resource use and environmental impacts. The chapter details how potentially harmful emissions can be assessed and measured at each stage in the life cycle of sheep products.

A prerequisite to improving the sustainability of agriculture are reliable methods to identify and quantify types of environmental impact. This collection summarises current research on the use of life cycle assessment (LCA) and other modelling techniques to measure and improve the sustainability of agriculture. Part 1 looks at current best practice and key methodological challenges in life cycle assessment. Part 2 reviews ways of modelling particular types of impact, from nutrient and carbon cycles to freshwater balances, energy use, pesticide use and biodiversity. Part 3 reviews the environmental assessment and optimization of sectors such as crops, ruminant and other livestock production as well as by-products. Assessing the environmental impact of agriculture will be a standard reference for researchers in agricultural and environmental science concerned with understanding and mitigating the environmental impact of agriculture.