translate English to French: Whereas genotoxic chemicals may damage DNA at even the lowest levels of exposure, non-genotoxic agents are believed to have a critical threshold level that must be exceeded for harmful effects to occur [Scientific and Organizing Committee 1991; International Expert Panel on Carcinogen Risk Assessment, 1996].
Tandis que les substances chimiques génotoxinotènes peuvent altérer l'ADN même aux plus faibles concentrations, on estime que les agents non génotoxinogènes ont un seuil critique au-delà duquel se manifestent des effets nocifs [Scientific and Organising Committee, 1991; International Expert Panel on Carcinogen Risk Assessment, 1996].