Polypropylene, or PP, is used in the products in this photograph as well as diapers, pails, dishes, candy containers, and lab equipment.
Makers of electronics packaging, including Microsoft, are increasingly using the recycled material instead of toxic PVC.
Polypropylene is regarded as a relatively benign plastic. But Japanese researchers have found that tiny pellets of polypropylene floating in the ocean concentrate poisons including DDT and PCBs at levels one million times stronger than in the water.
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