Robin and her treatment and recovery has reminded all of us in the "gma" family of the battle that so many are fighting against cancer. And in her new book, "a world without cancer," dr. Margaret... See More
Robin and her treatment and recovery has reminded all of us in the "gma" family of the battle that so many are fighting against cancer. And in her new book, "a world without cancer," dr. Margaret cuomo, sister of our correspondent, chris cuomo, talks about it with amy robach. Reporter: A world without cancer. It's a world we'd like to live in. But radiologist dr. Margaret cuomo says we can get there. The focus needs to be on prevention. We want to prevent it all the way. And we have the power to do that. we could prevent more than half of all cancers that occur in the u.S., With what we know right now. And cuomo says there are some simple steps you can take to cut your risk. First, she says, what you eat can play a role in cancer risk. Two-thirds of your plate should consist of whole grains, vegetables and fruits. And one-third, should be a lean protein like fish. There are specific foods out there that are cancer-preventing. What are they? That's right. You have broccoli and spinach and kale. You have tomatoes. It's the processed or cooked tomato that has more of a lycopene, which is supposed to be cancer-preventing. That means tomato sauce, tomato juice. Reporter: And don't forget the spiced turmeric. It contains anti-inflammatory agents that can decrease the big "c." What about cancer-causing items in our environment? Chemicals known as perks from our dry cleaner can be dangerous. If you have no choice, when you bring home your dry cleaning, remove the plastic bag. Let the clothes air out before putting them in your closet or on your body. Reporter: Empowering us all to take back some control from this devastating disease. For "good morning america," amy robach, abc news, new york.
This transcript has been automatically generated and may not be 100% accurate.