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.
Jun 2002: IRIS TOXICOLOGICAL REVIEW OF BENZENE (NONCANCER EFFECTS) (Report) May 1999: EXTRAPOLATION OF THE BENZENE INHALATION UNIT RISK ESTIMATE TO THE ORAL ROUTE OF EXPOSURE (EXTERNAL REVIEW DRAFT) (Report) Sep 1998: IRIS Toxicological Review of Benzene (Noncancer Effects) (1998 External Review Draft) (Report)