Which of the following is not a pollutant?

Options

A. Hot water
B. Garbage
C. Fertilizers
D. Oxygen

Answer

To determine which of the following options is not a pollutant, we need to understand what a pollutant is. A pollutant is any substance that, when introduced into the environment, causes harm or adverse effects. Let's analyze each option one by one:

1. **Hot Water**: When hot water is discharged into natural water bodies, it can raise the temperature of the water, which is harmful to aquatic life. Therefore, hot water is considered a pollutant.

2. **Fertilizers**: Chemical fertilizers, when used excessively, can leach into water bodies through runoff during rain, leading to water pollution. Hence, fertilizers are also classified as pollutants.

3. **Garbage**: Waste materials, including plastics and other refuse, contribute to various forms of pollution, including soil and air pollution when burned. Thus, garbage is definitely a pollutant.

4. **Oxygen**: Oxygen is a vital gas for life and does not cause pollution. It is essential for respiration in living organisms and does not have harmful effects on the environment in normal concentrations.

After analyzing all the options, we conclude that the correct answer is **Oxygen**, as it is not a pollutant.

### Final Answer:
**Oxygen is not a pollutant.**

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