The ozone layer is crucial for life on Earth as it absorbs the majority of the Sun's harmful ultraviolet (UV) radiation. This protective shield allows life to thrive on the surface by preventing UV rays that can lead to skin cancer, cataracts, and other health issues in humans and damaging ecosystems. Additionally, the ozone layer plays a role in regulating Earth’s climate and ecosystems. Without it, life as we know it would be severely threatened, making the ozone layer a vital component of our planetary health and sustainability.