1. Persistent Organic Pollutants
These types of toxins accumulate (in plants, animals, or humans) as lower organisms are consumed by those higher on the food chain. ... The lake was home to many types of wildlife, including western grebes. ... Eventually the birds" fatty tissue was tested and DDD was found. ... Other organisms in the lake were tested. ... Water samples showed that the water was now free of the chemical and should allow a safe, clean environment. ...
- Word Count: 2382
- Approx Pages: 10
- Has Bibliography
- Grade Level: High School