What crucial function does the ozone layer serve in the Earth's atmosphere?

The ozone layer plays a critical role in protecting life on Earth by absorbing the majority of the sun's harmful ultraviolet (UV) radiation. This layer, located in the stratosphere, contains a high concentration of ozone (O₃) molecules, which effectively filter out UVB and UVC rays that can cause skin cancer, cataracts, and other health issues in humans, as well as detrimental effects on ecosystems and wildlife.

The absorption of harmful radiation is essential in maintaining the health of both terrestrial and aquatic ecosystems, as it prevents excessive UV exposure that could lead to disruptions in biological processes. In addition to health impacts, UV radiation can affect agricultural productivity and the stability of food supplies by harming plant life and phytoplankton in oceans.

While regulating temperature, supporting atmospheric pressure, and managing precipitation are important atmospheric functions, they are not the primary roles of the ozone layer. The significance of the ozone layer lies primarily in its protective ability against UV radiation, making it crucial for sustaining life on the planet.