Canadian Study Reveals New Class of Potential POPs

摘要

Dioxin, PCBs, the pesticide DDT-these pollutants are considered among the most dangerous on the planet because they don't break down easily, are highly toxic, and build up in the food chain. Because these chemicals stay put in our body fat, even tiny amounts in food can add up over time and contribute to health problems such as cancer. So worrisome are the risks that more than 140 countries have endorsed a 2001 international treaty that aims to banish a dozen of these substances from the environment.