Which environmental factor is considered a risk for cancer?

Sunlight exposure is recognized as a significant environmental factor that can increase the risk for certain types of cancer, particularly skin cancer. The ultraviolet (UV) radiation emitted by the sun is a known carcinogen. Overexposure can damage the DNA in skin cells, leading to mutations that may result in cancer over time. People who spend prolonged periods in the sun without proper protection, such as sunscreen or protective clothing, have a higher likelihood of developing melanoma and other skin cancers.

In contrast, regular exercise, a healthy diet, and low levels of stress are generally considered protective factors that contribute to overall health and can help reduce the risk of cancer. Engaging in regular physical activity, consuming a balanced diet rich in fruits and vegetables, and maintaining manageable stress levels promote a healthier lifestyle that may lower the likelihood of cancer development.