Stratosphere
The stratosphere starts just above the troposphere and extends to 50 kilometers (31 miles) high. The ozone layer, which absorbs and scatters the solar ultraviolet radiation, is in this layer.
Sources
NASA, 2013. Earth's Atmospheric Layers. https://www.nasa.gov/mission_pages/sunearth/science/atmosphere-layers2…. Accessed 30 June 2021.