Almost half of cancer deaths in U.S. adults could be prevented, new study finds. A doctor explains how.

Want to do what you can to reduce your risk of cancer? A new study is pointing to some specific actions you can take — and how much difference it can make.

In the American Cancer Society study, published Thursday in CA: A Cancer Journal for Clinicians, researchers found more than 40% of all cancer fatalities among adults age 30 and over in the United States could be linked to lifestyle risks that can be changed.

The most impactful of these risk factors include: