In this Dec. 22, 2016 photo, Auguste Augustin, a "bayakou", or human waste cleaner, balances himself at the top of a pit latrine ready to receive human waste from a coworker, in Port-au-Prince, Haiti. Haiti still relies mostly on crude methods of waste disposal that have crippled its ability to combat cholera, a water-borne illness that can cause diarrhea so severe that victims can die of dehydration in hours if they don't get treatment. (AP Photo/Dieu Nalio Chery)