Short-Term Test Systems for Detecting Carcinogens

The varying cancer incidence from country to country and region to region suggests that en­ vironmental factors play a considerable role in the aetiology of cancer. Whether these factors in the environment moderate the effect of car­ cinogenic chemicals or whether they might them­ selves be carcinogenic is not known at the present time. What is known is that there are various chemicals, both natur...