The term "carcinogenic" refers to substances or agents that can cause cancer in living tissue. These can be found in various forms, such as chemicals, radiation, or even certain viruses. For example, tobacco smoke is a well-known carcinogenic substance that significantly increases the risk of lung cancer and other types of cancer. Understanding carcinogenicity is crucial for public health, as it helps people make informed choices about their exposure to harmful substances. Regulatory agencies, like the World Health Organization, assess and classify these agents to protect individuals from potential risks. By being aware of carcinogenic factors, we can take steps to reduce our chances of developing cancer.