Yup. A lot of people blame environmental hazards for perceived clusters of cancer patients in neighborhoods. But behaviors are much bigger contributors to cancer risk these days. The best ways by far to avoid cancer these days are (1) don't smoke, (2) maintain a healthy BMI, (3) don't drink, and (4) eat plenty of vegetables. If you want to further reduce your risk of dying of cancer, (5) get the recommended screenings, and (6) get regular physical checkups and talk to your doctor about any new health problems.

Reducing one's cancer risk is well within the power of any person. But "People should just have more willpower" is an ineffectual public policy.