What are the main components of the stratosphere?

The stratosphere, the second layer of Earth's atmosphere, primarily consists of nitrogen (about 78%) and oxygen (about 21%), similar to the troposphere. It also contains ozone (O₃), which is concentrated in the ozone layer and plays a crucial role in absorbing harmful ultraviolet (UV) radiation from the sun. Other trace gases, such as carbon dioxide, argon, and water vapor, are present in smaller amounts. The stratosphere is characterized by a temperature increase with altitude, mainly due to the absorption of UV radiation by ozone.