Seems like everything these days can cause cancer. If you live your life in fear of cancer, and try to avoid all things that can potentially cause cancer, you're going to end up in a bubble going crazy.
The key (to really many things in life) is moderation.
If you want to have a nice cold cut sandwich, have one every once in a while, not three times a day.
If you want a nice ice cold beer after a long hard day of work, have just one.
From what I understand, if you're genetically disposed to develop cancer it's a matter of where and when. (I could be completely wrong on that). There are definitely things you can do to help prevent the mutation of cancerous cells, such as diet, exercise, and avoiding things like smoking but ultimately if you're going to get it then you're going to get it.
Cherish life!