Stratosphere
The layer of the atmosphere that has the maximum concentration of ozone gas is the stratosphere. Ozone is a gas composed of three oxygen atoms (O3) that plays a crucial role in absorbing the sun's ultraviolet radiation.

Importance of Ozone in the Stratosphere
- Ozone in the stratosphere forms the ozone layer, which acts as a shield protecting life on Earth from harmful ultraviolet (UV) radiation.
- It absorbs the majority of the sun's high-frequency UV radiation, preventing it from reaching the Earth's surface where it can cause skin cancer, cataracts, and other health issues.

Location of Ozone in the Stratosphere
- Ozone is primarily concentrated in the lower portion of the stratosphere, at an altitude of about 15 to 35 kilometers above the Earth's surface.
- This layer is known as the ozone layer and is responsible for filtering out a significant amount of the sun's harmful UV radiation.

Formation of Ozone in the Stratosphere
- Ozone in the stratosphere is formed through a process involving the interaction of solar ultraviolet radiation with oxygen molecules (O2).
- When high-energy UV radiation hits an oxygen molecule, it can split the molecule into two oxygen atoms. These oxygen atoms can then combine with other oxygen molecules to form ozone.

Human Impact on the Ozone Layer
- Human activities, such as the release of chlorofluorocarbons (CFCs) and other ozone-depleting substances, have led to the thinning of the ozone layer.
- The depletion of the ozone layer can result in increased levels of UV radiation reaching the Earth's surface, leading to adverse effects on human health and the environment.
In conclusion, the stratosphere contains the maximum concentration of ozone gas, which is crucial for protecting life on Earth from the harmful effects of UV radiation.