A woman shops at a supermarket in New York City, the United States, in this file photo. Although global food prices decreased slightly in December month on month, they were much higher throughout last year than in 2020, the United Nations said Friday. Abdolreza Abbassian, senior economist of the UN Food and Agriculture Organization (FAO), said the FAO Food Price Index was 28.1 percent higher than in 2020.Xinhua | 