While we've come a long way in reducing harmful pollutants in the environment, certain chemicals, called persistent organic pollutants, are still widely used and have been detected in breast milk at increasing levels.
(we; 've come; ) (certain chemicals; called; persistent organic pollutants) (certain chemicals, called persistent organic pollutants; are widely used; T:still) (certain chemicals, called persistent organic pollutants; have been detected; L:in breast milk at increasing levels)
we certain chemicals certain chemicals, called persistent organic pollutants certain chemicals, called persistent organic pollutants
've come called are widely used have been detected
persistent organic pollutants
T:still
L:in breast milk at increasing levels