Not all carcinogens pose the same level of risk. Some are more potent and can cause cancer with lower levels of exposure, while others require prolonged or high-level exposure. The International Agency for Research on Cancer (IARC) classifies carcinogens into different groups based on their risk levels: - Group 1: Carcinogenic to humans - Group 2A: Probably carcinogenic to humans - Group 2B: Possibly carcinogenic to humans - Group 3: Not classifiable as to its carcinogenicity - Group 4: Probably not carcinogenic to humans
