This food may contain carcinogens.

Scientists are warning that this substance has carcinogenicity.

He is a famous author and a person who is respected by many people.

Sexology is the scientific study of human sexual behavior and sexuality.

He gave me a warning.

He warned me of the danger.

He is a world-famous scientist.

Smoking increases the risk of carcinogenesis.

Sufficient caution is necessary when handling radioactive materials.

Education about sex is very important.