After many years of tanning and sun-worshipping, reports came to light that said almost any amount of exposure to the sun would, and had resulted in skin cancer. Since then (several decades) we’ve been told that the sun is dangerous and we should cover up our skin anytime we go out. It was decided by experts that the use of sunscreen would prevent skin cancer and protect your health. This was recommended despite of a lack of any adequate safety testing of the chemicals in sunscreens. Commercial sunscreens popped up everywhere and a new billion dollar industry was born.