Sustainability: a wicked problem Production efficiency of ruminants: feed, nitrogen and methane Production efficiency of monogastric animals Animal welfare: an integral component of sustainability Genetics and sustainable animal agriculture Minimizing environmental impacts of livestock production using diet optimization models Sustainable manure management Water-related issues in sustainability: nitrogen and phosphorus management Air quality issues in sustainability: greenhouse gases and volatile organic compounds Integration of air and water quality issues The environmental sustainability of food production Economic sustainability in animal agriculture Achieving social sustainability in animal agriculture: challenges and opportunities to reconcile multiple sustainability goals Life cycle assessment in ruminant production Quantitative measurements of ammonia and methane loss from livestock Manipulation of microbial ecology for sustainable animal production Emerging contaminants in livestock manure: hormones, antibiotics and antibiotic resistance genes Animal agriculture: how can it be sustainable in the future?