Toxics ??? whether they are generated far away in industrial plants or reside in cleaning products tucked under the kitchen sink ??? are firmly planted on the list, too, fanned by a steady spate of scares over such chemicals as asbestos, PCBs and their dioxin and hormonal effects, perchloroethylene (???perc???) used in dry cleaning, polyvinyl chloride (PVC), phthalates, the softening agent in plas