World Cleanup Day links clean plates to clean cities

World Cleanup Day on September 20 uses the theme 'From Clean Plates to Clean Cities,' with the global observance in Shaoxing, China. UN figures say households, food services and retail wasted about 1.05 billion tonnes of food in 2022, equal to 19% of food available to consumers; households produced 60%, and food loss and waste generate 8-10% of global greenhouse-gas emissions.