Costa Rica’s microplastics problem is no longer limited to plastic bottles, bags, and debris washing up on beaches. Local research has found tiny plastic particles in coastal sand, marine sediments, fish, mollusks, crustaceans, cattle, pigs, chickens, and even Isla del Coco, one of the country’s most remote protected areas. Researchers said microplastics have appeared in more than 70% of the samples analyzed in Costa Rican studies, a finding tha…