Earth's atmosphere is important for several reasons: it supports the exchange of life-sustaining gases, filters sunlight, regulates temperature and even plays a role in the water cycle. The atmosphere contains five distinct layers. Its first layer, the stratosphere, is closest to Earth and serves as the activity spot for weather production and cloud formation. It contains an ozone layer, which prevents dangerous sun rays from passing through clouds and modifies temperature, letting life exist.
The layers of the atmosphere decrease in thickness upon moving from the first layer, closest to Earth, to the fifth and farthest layer. Each layer has a particular purpose, such as retaining certain gases and modifying temperature.
The atmosphere plays a large role in regulating the type and quantity of gases necessary for supporting life on Earth. This includes regulation of oxygen and carbon dioxide, two of the most important gases. The atmosphere also controls the amount of greenhouse gases in the air, which affects temperature and air quality.
Earth's atmosphere plays a key role in the planet's water cycle. It stores water in the form of water vapor, and initiates formation and movement of weather cycles and precipitation. The atmosphere plays a distinct role in regulating life, but the introduction of excessive volumes of greenhouse gases and synthetic compounds interrupt the atmosphere's routine functions, leading to issues like ozone holes, acid rain and global warming.