translate English to French: In March 1999, the NPRI Ad Hoc Work Group on Substances released its recommendations to Environment Canada for adding 73 new substances to the NPRI.
En mars 1999, le Groupe de travail spÃ©cial sur les substances de l'INRP a remis Ã Environnement Canada ses recommandations visant Ã faire ajouter 73 nouvelles substances Ã l'INRP.