Behind his stilt house on the Anajas River, dozens of natural rubber trees blend with centuries-old trees and palms typical of this island, surrounded by rivers on one side and the sea on the other.
As the sun rises over the Amazonian island of Marajo, Renato Cordeiro laces up his boots, grabs his knife, and heads out to tap his rubber trees. Drop by drop, he collects the milky white sap, known ...