A worker collects garbage on board of a moored  "trajinera" -traditional flat-bottomed river boat-at Xochimilco natural reserve in Mexico City, on April, 1 2016.  Xochimilco canals are one of the places most visited by local and foreign tourists, to go along the water, eat traditional food and enjoy Mariachi music.    AFP PHOTO/ Yuri CORTEZ / AFP / YURI CORTEZ        (Photo credit should read YURI CORTEZ/AFP/Getty Images)