Can wrong diet cause cancer or is it all genes?

Taken by permission from S.Bengmark

I saw dr Oz this morning. It was about obese children and their parents. One parent said that it's in their genes to be fat.. I will show you more studies later on that shows that this is not true but it's about how you play the genes you have. You've got sooo many genes and they can be turned on and turned off. For example, above is one study when it comes to how big part cancer has to do with genes. Under the subtitle, you see the reference to the study if you want to read the whole thing.

As you see, only 5-10 % has to do with genes and 90-95 % has to do with different environmental things.
Diet plays the biggest roll of the environmental causes, 30-35%. Obesity that normally comes from eating bad foods is 10-20 %.