This from an Economic Snapshot from the Economic Policy Institute is by Tony Avirgan:
Global Policy Networkhere
See also several articles from Dollars & Sense about the dangers of organizing in the palm oil, cut flower, and bottled beverage industries in Colombia: Blood on the Palms, Oil-Palm Plantations on Afro-Colombian Lands, Stop Killer Coke!, Some Roses Don't Smell So Sweet, and "Organizing Rural Labor in Colombia" (D&S November/December 2006, available only in the print edition).