Diet, exercise and tobacco affect your risk of developing what?

Well i don't know what diet and exercise could risk leading to since they are both a pretty healthy thing to do. But tobacco could lead to cancer?

Diet and exercise involves nothing but tobacco can make you get cancer but other wise it can make you sick cause tobacco I think can make you cough and wheeze so exercise wouldn't be that good of a idea.

Keep your hands washed and trash kept in trash cans.

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