Which of the following is linked to the greatest number of cancer deaths?smokingfamily historypollutionUltraviolet radiation

To determine which factor is linked to the greatest number of cancer deaths, we can analyze each option briefly.

1. Smoking: Smoking is the leading cause of lung cancer and is also associated with various other cancers, including those of the mouth, throat, esophagus, bladder, and pancreas. It accounts for a significant percentage of cancer-related deaths globally.

2. Family History: While having a family history of cancer can increase an individual’s risk, it does not link to a specific number of cancer deaths like smoking or environmental factors do.

3. Pollution: Environmental pollution contributes to various cancers, particularly lung cancer, but it is generally regarded as less impactful than smoking in terms of overall cancer mortality.

4. Ultraviolet Radiation: UV radiation is a known risk factor for skin cancer, specifically melanoma. However, it has a smaller impact compared to smoking-related cancer deaths.

Considering these points, smoking is linked to the greatest number of cancer deaths among the options listed. It has been documented to be responsible for approximately 20-30% of all cancer deaths, making it a significant public health concern.