The impact of ultraviolet (UV) radiation on living organisms can be significant, leading to cellular damage and environmental changes. UV radiation, particularly UV-B, can cause mutations in DNA, resulting in skin cancers and other health issues in humans and animals. In plants, excessive UV exposure can inhibit photosynthesis and alter growth. Additionally, UV radiation affects aquatic ecosystems, harming phytoplankton and disrupting food chains. On the positive side, moderate UV exposure is essential for vitamin D synthesis in humans. Thus, UV radiation presents both challenges and benefits for living organisms.