I imagine if your diet consists of things like "french fries sitting in a puddle of antifreeze and oil leakage from the side of the road" you could get cancer quite quickly :-)
I'm not really convinced that's the cause of cancer...
My aunt used to eat antifreeze and motor oil with her french fries and she lived to 103.
I don't know about cancer, but definitely some chemical poisoning -> thus proving pavel_lishin's point :).