Group names most toxic kids' car seats

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A study that tested children's car seats found that six-out-of-10 contain at least one toxic chemical -- and some contain several.

The research, by Ecology Center, a nonprofit environmental group, was conducted on 150 seats in three categories: infant, convertible and booster. The study was reported by Ecology Center and HealthyStuff.org. 

Pictures: Most, least toxic car seats named

The 2011-model car seats were tested for bromine (associated with brominated flame retardants), chlorine (indicating the presence of polyvinyl chloride, or PVC and plasticizers), lead, other heavy metals, and allergens.

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The nonprofit named what it deemed the most and least toxic among those studied.

Most Toxic 2011 Car Seats:

Least Toxic 2011 Car Seats:

Overall, the nonprofit said, car seats are improving in terms of their toxicity levels. Since 2008, when the Ecology Center began this research, average car seat rankings have improved by 64 percent.

Research was also conducted on models by Alpha Sport, Baby Trend, Clek, Compass, Dorel Juvenile Group (Cosco, Eddie Bauer, Maxi-Cosi, Safety First), Evenflo, Fisher Price, Harmony Juvenile, Orbit Baby, Peg Perego, Sunshine Kids, Teutonia and The First Years.