Food waste in the global food supply chain is reviewed in relation to the prospects for feeding a population of nine billion by 2050. Different definitions of food waste with respect to the complexities of food supply chains (FSCs)are discussed. An international literature review found a dearth of data on food waste and estimates varied widely; those for post-harvest losses of grain in developing countries might be overestimated. As much of the post-harvest loss data for developing countries was collected over 30 years ago, current global losses cannot be quantified. A significant gap exists in the understanding of the food waste implications of the rapid development of ‘BRIC’ economies. The limited data suggest that losses are much higher at the immediate post-harvest stages in developing countries and higher for perishable foods across industrialized and developing economies alike. For affluent economies, post-consumer food waste accounts for the greatest overall losses. To supplement the fragmentary picture and to gain a forward view, interviews were conducted with international FSC experts. The analyses highlighted the scale of the problem, the scope for improved system efficiencies and the challenges of affecting behavioural change to reduce post-consumer waste in affluent populations.

The technique 'hotspots analysis' belongs to the toolbox life cycle management. 'Hotspotting' or 'hotspots analysis' is an emergent technique being used in a growing number of different analytical disciplines, so research disciplines and functions within organizations (e.g., R&D, new product development, procurement), and in diverse geographies, in support of the green economy and the United Nations post-2015 Sustainable Development Goals. It can be used to inform government policy priorities, drive growth and innovation in business and empower citizens.Due to the growing interest of various stakeholders in applying hotspot analysis methodologies, the UNEP/SETAC Life Cycle Initiative initiated the project "Global Principles and Practices for Hotspot Analysis". During the fi rst phase of the project, a study was conducted to map existing hotspots analysis methodologies and studies world-wide, which culminated in the report: Hotspots Analysis: mapping of existing methodologies, tools and guidance and initial recommendations for the development of global guidance . This chapter draws on knowledge derived from this report and presents a number of relevant fi ndings.

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