Whenever someone has something to sell, the desire to make a profit will mean that the benefits of the product risk being overblown and it's negative aspects swept aside. Cancer causing chemicals are used in the creation of sunscreens. These chemicals do end up in our envirinment. Sun exposure is associated with reduced risks of cancer because it creates vitamin D in the body. Yet, this article does remind people that the sun can burn them at this time of the year, in the northern hemisphere, and this is a good reminder thank you.