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ROME, ITALY - NOVEMBER 20: Pope Francis greets Queen Letizia of Spain during the Second International Conference on Nutrition in the Plenary Hall at the Fao Headquarter on November 20, 2014 in Rome, Italy. In his address to participants the Holy Father spoke of waste and excessive consumption of food. (Photo by Vatican Pool/Getty Images)

ROME, ITALY - NOVEMBER 20:  Pope Francis greets Queen Letizia of Spain during the Second International Conference on Nutrition in the Plenary Hall at the Fao Headquarter on November 20, 2014 in Rome, Italy. In his address to participants the Holy Father spoke of waste and excessive consumption of food.  (Photo by Vatican Pool/Getty Images)