In linguistics and grammar, a pronoun (abbreviated PRO) is a word that substitutes for a noun or noun phrase. It is a particular case of a pro-form.
Some of the most significant toxic effects associated with substances used or emitted in plastic production include: 13. 1  Benzene (PET, PVC, LDPE, PP): known human carcinogen, workplace exposure depresses the nervous system. 2  Chromium oxide (HDPE, LDPE): suspected carcinogen, damaging to the liver and nervous system.ome of the most significant toxic effects associated with substances used or emitted in plastic production include: 13. 1  Benzene (PET, PVC, LDPE, PP): known human carcinogen, workplace exposure depresses the nervous system. 2  Chromium oxide (HDPE, LDPE): suspected carcinogen, damaging to the liver and nervous system.
The chemical symbol for benzene is C6H6. Benzene is formed from both natural processes and human activities. It is produced from volcanoes and forest fires and is a natural part of crude oil, gasoline, and cigarette smoke. Diesel exhaust contains benzene.Benzene is one of the 20 most widely used chemicals in the United States. It is used to make other chemicals that are then used to make plastics, resins, nylon, and other synthetic fibers.ou can be exposed to benzene indoors at home, where the air can contain higher levels of benzene than outdoor air, from products such as glue, paint, furniture wax, and detergent. Approximately half the national exposure to benzene comes from smoking cigarettes or being exposed to cigarette smoke, indoors or outdoors.