title: Perspective in a period of transition.
mesh_terms: D002273:Carcinogens; D004781:Environmental Exposure; D005821:Genetic Techniques; D006801:Humans; D009153:Mutagens; D011137:Polystyrenes; D011143:Polyvinyl Chloride / Q000009:adverse effects
chemical_list: D002273:Carcinogens; D009153:Mutagens; D011137:Polystyrenes; D011143:Polyvinyl Chloride