Where is good ozone present ? Why is it called so ?

Explanation

**Step-by-Step Solution:**

1. **Definition of Ozone**: Ozone is a gas composed of three oxygen atoms, represented chemically as O3.

2. **Location of Good Ozone**: Good ozone is primarily found in the stratosphere, which is a layer of the Earth's atmosphere located above the troposphere and below the mesosphere.

3. **Function of Good Ozone**: In the stratosphere, ozone forms a protective layer known as the ozone layer. This layer plays a crucial role in filtering out harmful ultraviolet (UV) radiation from the sun.

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