The Food and Nutrition Unit (UAN) is an operation that aims to nourish groups of people. In Brazil, this segment feeds more than 10.0 million people a day, consuming more than 3,000 tonnes of food a day and generating waste as a result of this production process. Minimising waste at source is one of the actions proposed by cleaner production (P+L) in the management of technologies aimed at the sustainable development of organisations. This book covers the concepts of P+L in a UAN, with the aim of minimising the generation of waste at source.