This excerpt taken from the BBBY DEF 14A filed Jun 8, 2007.
PVC Issues: Additives mixed with PVC resins can leach or volatilize from a PVC product during its useful life and contribute to the development of respiratory problems in children. When produced or burned PVC plastic forms dioxins, a highly carcinogenic group of chemicals that build up in the food chain.
The use of PVC faces increasing restrictions. Many cities, including New York, Boston, Seattle and San Francisco, have enacted policies to avoid purchase of materials such as PVC that lead to persistent pollution. Safer, cost-effective alternatives exist.