They're in just about all our homes -- couches and chairs containing polyurethane foam -- which contain large quantities of chemical flame retardants, mandated by California law. But flame retardants have been linked to numerous health problems, including cancer, learning problems and infertility, and state lawmakers are now considering whether to overhaul the law. The debate was started by Berkeley scientist Arlene Blum, who pioneered research showing the dangers of Chlorinated Tris in children's pajamas. She succeeded in getting it removed from clothing, in 1977. Now, decades later, she's back on the front lines battling flame retardants, this time, in our furniture.