. >> the neuro-developmental effects--so that's exposures during pregnancy or early in liffe, linking t to neueuro-developmental effects inin animals, have now bebeen evaluated in two human studies. so there's one in a population in new york and one in a population i in california. and what they find is actually remarkably similar. these developmental exposures to pbdes are actually linked to detriments in i.q. >> two pbdes, penta and octa, were taken off the u.s. market voluntarily in 2004 because of growing health concerns. production of the pbde deca is in the process of being terminated. >> the problem with all of these pbdes is that t they arere very persistent in the environment. >> the i issue with pbdes is tht ththey've been replalaced withtr types of chemicals ththat may he very sisimilar concerns and perhaps even the same mechanism of action, i in terms of their ability to disrupupt the endocrine s system. >> the flame retardants chlorinated tris and fire master 550, which may be linked to dna damage, cancer, or neurological defects, continue to be widely used in polyurethan