Men work at a coca paste laboratory in a municipality of Nariño department, Colombia, on May 11, 2023. The rise of synthetic opiates such as fentanyl, overproduction of coca, and blows to the cartels are some of the hypotheses of experts, growers, and authorities given the apparent end of the so-called "coca boom" in Colombia, the world's leading cocaine producer. (Photo by Andres Botero / AFP)