The main purpose of the ozone layer is to protect life on Earth by absorbing the majority of the sun's harmful ultraviolet (UV) radiation. Located in the stratosphere, approximately 10 to 30 miles above the Earth's surface, the ozone layer acts as a shield, preventing excessive UV rays from reaching the surface. This protection is crucial for reducing the risk of skin cancers, cataracts, and immune system suppression in humans, as well as safeguarding ecosystems and wildlife. Efforts to curb ozone-depleting substances have helped in the recovery of this critical layer over the past few decades.