Which contains dozens of carcinogens?

sunlight

tobacco smoke

asbestos

All three factors asbestos, tobacco smoke, and sunlight has carcinogens and they show effects at various levels.

For example, High sunlight in mid day may emits uv rays which are carcinogenic and leads to skin cancer.

Whereas, Tobacco smoke leads to lung cancer, mouth cancer, throat cancer etc ...

While Asbestos causes lung, larynx, ovarian cancers etc ...