Energy and protein metabolism and nutrition in sustainable animal production

The notion of feeding 9 billion people sustainably in the next forty years presents considerable challenges.Population growth and human dietary changes remain the key drivers of the large increases in future food demand.While the world food system can respond to meet this demand, there are challenges to ensure this happens sustainably, equitably and within our conceived limits of a safe environmental space.This paper discusses the key trends in food production and consumption, and the key challenges for feeding the planet.Especial attention is given to livestock, a key part of the puzzle for ensuring sustainable nutritional security and environmental sustainability for future generations.