Cause
A widely acclaimed documentary the BBC aired in 2000 first revealed just how prevalent the use of child labor had become.
Nearly two decades later, a 2018 report (link below) about the cocoa industry in Ghana and Ivory Coast, published by the U.S. Labor Department, found that nearly 45 percent of children living in agricultural households worked in cocoa fields, a total of at least 1.6 million children.
https://www.dol.gov/sites/dolgov/files/ILAB/legacy/files/CLCCG2018AnnualReport.pdf