From Within or Without

While on vacation on the beach, I observe an extremely sun-burnt man smoking a cigarette on the beach.  I lean over to my cousin and whisper "Cancer - either from within or without!"

From the NIH:
"While the symptoms of sunburn are usually temporary (such as red skin that is painful to the touch), the skin damage is often permanent and can have serious long-term health effects, including skin cancer." and
"Smoking is a leading cause of cancer and death from cancer."





What if people could see these microscopic events in real time, would that help?