Ozone occurs naturally in the troposphere.

Answer

### Step-by-Step Solution:

1. **Understanding Ozone Formation**:
- Ozone (O₃) is formed when ultraviolet (UV) radiation from the sun interacts with oxygen molecules (O₂) in the atmosphere. This process involves the splitting of O₂ into individual oxygen atoms (O).
- The reaction can be summarized as:
\[ \text{O}_2 \xrightarrow{\text{UV}} 2\text{O} \]
- These free oxygen atoms (O) are highly reactive and can combine with other O₂ molecules to form ozone (O₃):
\[ \text{O} + \text{O}_2 \rightarrow \text{O}_3 \]

2. **Location of Ozone**:
- Ozone is primarily found in the stratosphere, which is the second layer of Earth's atmosphere, located approximately 10 to 50 kilometers above the Earth's surface.
- The troposphere, on the other hand, is the lowest layer of the atmosphere, extending from the Earth's surface up to about 10 kilometers. It contains weather phenomena and is where most of the Earth's air mass resides.

3. **Evaluating the Statement**:
- The statement in the question claims that "Ozone occurs naturally in the troposphere."
- While ozone can be present in the troposphere, it is not naturally occurring in significant amounts like it is in the stratosphere. The ozone present in the troposphere is primarily a result of human activities and pollution, which leads to its formation through chemical reactions involving pollutants.

4. **Conclusion**:
- Given that the statement claims ozone occurs naturally in the troposphere, and considering that significant amounts of ozone are actually found in the stratosphere, the statement is **false**.

### Final Answer:
The statement "Ozone occurs naturally in the troposphere" is **false**.

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