date:Feb 13, 2019
al carcinogenic factors, including radiation, chemicals, mixtures, physical and biological factors, life behavior and viruses. According to the degree of carcinogenesis, IARC classifies carcinogenic factors into five categories and four grades: carcinogenic, possible carcinogenic, unknown and possible non-carcinogenic.
There are 111 species listed in the first grade. There is sufficient evidence and animal test results to prove that they are carcinogenic, including radioactive substances, asbes