. >> oink, oink. >> sreenivasan: silicon valley tech workers adrienne and jeremy clem are the proud parentsth-old vivienne and are expecting their second child next month. they've spent a lot of time researching baby gear, and one of their main concerns was finding products without flame retardants, chemicals which slow the ignition of potentially flammable materials like textiles and plastics. >> this is a nursing pillow without flame retardants. i did find it online after doing a lot of research. i was very surprised it was hard to find products without them. >> sreenivasan: flame retardants were added to upholstered furniture and other household products starting in the mid 1970s to help prevent house fires. but what seemed like a good idea came with a downside. a number of studies have linked flame retardants to human health concerns such as cancer, neurological impairments and fertility problems. some flame retardants have been banned by the federal government for health concerns, others have been phased out voluntarily by manufacturers. but many remain in use today. worried about the