Final answer:
A carcinogen is any agent that directly increases the incidence of cancer. Carcinogens can be biological, physical, or chemical in nature. Examples of carcinogens include formaldehyde, asbestos, radon, vinyl chloride, and tobacco.
Step-by-step explanation:
A carcinogen is any agent that directly increases the incidence of cancer. Carcinogens can be biological, physical, or chemical in nature. They can either directly damage DNA or accelerate cell division, leaving less opportunity for cells to repair induced mutations.
Examples of carcinogens include formaldehyde, asbestos, radon, vinyl chloride, and tobacco.