Overview
Atmospheric layers are the distinct regions of air that lie above the Earth's surface. These layers are composed of gases, ice crystals, and dust, and vary in chemical composition depending on their altitude. The Earth's atmosphere is divided into five major layers: the troposphere, stratosphere, mesosphere, thermosphere, and exosphere. Each layer has its own unique properties and functions which are essential for the survival of life on Earth; for example, the troposphere provides the majority of the air we breathe, while the stratosphere is home to the ozone layer which shields us from harmful ultraviolet radiation. Additionally, atmospheric layers are important for regulating the global climate, as they help trap heat and regulate temperature. Understanding the layers of the atmosphere and the various processes that occur within each layer is important for understanding the Earth and its climate, and is essential for climate change mitigation.