When it comes to risk factors and cancer, some are unavoidable, such as genetics. But on the other hand, the American Cancer Society is working hard to help you learn what is causing it and how to prevent it. Marcie Fraser reports.

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"We know that there is a direct correlation between tobacco use and second hand smoke with lung cancer and heart disease," said Kristie Robertson, American Cancer Society.

Age is also a risk factor. As we get older, our cancer risk increases.

"Most of the cancer risk factors are with older people but we’re certainly noticing trends with younger children being obese at earlier ages and epidemic crosses all over age groups,” said Robertson.

The rate of obesity for children is alarming. Research shows obesity is directly related to colon cancer and breast cancer.

"On average, two out of three are overweight because of processed food, lack of physical activity, sedentary lifestyle that are contributing to cancer," said Robertson.

Decreasing your risk can be as easy as eating more fruits and vegetables.

“One third of cancer deaths are tied to obesity and we need to focus on better diet and nutrition," said Robertson.

Eating right and exercising can reduce your risk, but how much? Many people don't exercise enough, but there are guidelines for everyone to follow.

"The American Cancer Society encourages 20 to 30 minutes, five days a week. That behavior will keep weight down and have a healthy weight throughout life," said Robertson.

The American Cancer Society is doing research right now to help pinpoint other possible links to cancer. If you are interested in participating, log onto www.cancer.org/cps3.