(Articles) Basically, the sun emits ultraviolet (UV) radiation that at some level helps the skin fight nasty germs and skin diseases. UV rays are even important to Vitamin D3 production in the body. However, overexposure to UV is very dangerous, especially now that the ozone layer has significantly depleted. Such part of the atmosphere is supposed to protect us from the sun's harm. Not anymore though, because we are taking things for granted. That's why sun protection now lies within our hands. We need to wear sunscreen even if it's not spring break. (Articles)