MILAN, ITALY - OCTOBER 16:  (L-R) Jose Graziano da Silva, Director General of FAO and Queen Letizia of Spain attend the World Food Day - Expo 2015 on October 16, 2015 in Milan, Italy. The focus of the discussion during the World Food Day 2015, held today in Milan, was how to combat food waste in the world. Queen of Spain Letizia , ambassador of the FAO (United Nations Organization for Food and Agriculture), was among the participants.  (Photo by Pier Marco Tacca/Getty Images)