The primary purpose of the ozone layer in the atmosphere is to absorb the majority of the Earth's ultraviolet (UV) radiation. This protective layer, located in the stratosphere, filters out harmful UV rays that can lead to skin cancer, cataracts, and other health issues. Additionally, it plays a crucial role in maintaining the ecosystem balance by shielding living organisms from excessive radiation, which can affect both terrestrial and aquatic environments. The depletion of the ozone layer due to human-made chemicals, known as ozone-depleting substances, has raised global concern, highlighting the need for environmental protection measures.