What layer of the atmosphere is the ultraviolet light blocked?

Ultraviolet (UV) light is primarily blocked by the ozone layer, which is located in the stratosphere, approximately 10 to 30 miles above the Earth's surface. The ozone molecules absorb the majority of the Sun's harmful UV radiation, particularly UV-B and UV-C rays. This protective layer is crucial for shielding living organisms from the damaging effects of excessive UV exposure.