Step 1: Understanding the Concept:
The atmosphere is divided into layers based on temperature gradients.
Ozone ($O_3$) is a gas that plays a crucial role in shielding the Earth from harmful ultraviolet (UV) radiation.
Step 2: Detailed Explanation:
Approximately 90% of the Earth's ozone is found in the Stratosphere, specifically in a region known as the "Ozone Layer".
This layer is typically located between 15 km and 35 km above the Earth's surface.
In the Stratosphere, ozone is produced by the interaction of solar UV radiation with molecular oxygen ($O_2$).
The absorption of UV radiation by ozone is also responsible for the temperature increase observed with altitude in the Stratosphere.
Step 3: Final Answer:
The maximum concentration of Ozone is found in the Stratosphere.