Comment by Notorious_BLT

Eventually we all have to die of something. Evolution does a great job optimizing for protecting us against ailments that kill us before breeding age, but a pretty crap job of keeping us safe from things that kill us in old age. Cancer is a major cause of death as we age because it gets more likely the older you get. You can certainly take steps to avoid making yourself extraordinarily vulnerable (don't hang out around tons of radiation, wear sunblock, don't smoke, etc) but enjoying the smell of a new car seems unlikely to be the factor that suddenly means you will die of cancer.