Food waste is often understood to be edible or inedible food that has degraded or been polluted, is eliminated from the food chain, and has to be recycled. As per the UNEP 2021 data, 931 million tonnes of food waste is produced yearly. The leading causes are farm losses due to unsuitable weather conditions, unwanted pests, high labour costs, and low market prices; losses due to improper storage, packaging, or transportation after harvest activity; and false motivation by the retailers to buy more stuff than the customers require. Food waste has become a significant issue due to its environmental impact. When the food wasted ends up in large, abundant areas of land, it produces massive amounts of methane emissions. The most significant social impact of food waste includes hunger and malnutrition. The world’s 2023 Global Hunger Index score is 18.3, which indicates that, as previous data have shown, the progress in decreasing hunger has been modest. According to the UNEP Food Waste Index 2021, 68.7 million tonnes of food are wasted annually in Indian households, or about 50 kg per person. Different countries, including India, have taken specific steps to mitigate this global issue. This chapter discusses the various aspects of food waste, different definitions and causes, and its effect on the environment and socio-economy. A separate section describes the food waste generation in India and the steps taken in detail. The measures taken up by different countries like Japan, South Korea, France, and Denmark are also discussed.