Which one of the following is a source of energy but does not cause pollution ?

Options

A. Gasoline
B. Nuclear power plants
C. Fossil fuels
D. Sun

Answer

To solve the question "Which one of the following is a source of energy but does not cause pollution?", we will analyze each option provided in the context of their environmental impact.

### Step-by-Step Solution:

1. **Identify the Options**: We need to consider the options provided in the question. The common sources of energy include gasoline, nuclear power, fossil fuels, and renewable energy sources like solar or wind energy.

2. **Evaluate Gasoline**:
- Gasoline is a fossil fuel that, when burned, releases pollutants such as carbon monoxide, nitrogen oxides, and unburnt hydrocarbons.
- These emissions contribute significantly to air pollution and the greenhouse effect, leading to global warming.
- **Conclusion**: Gasoline causes pollution.

3. **Evaluate Nuclear Power**:
- Nuclear power plants use uranium as fuel.
- While nuclear energy itself does not produce air pollutants during operation, the mining and extraction of uranium can release carbon dioxide and other harmful substances into the environment.
- **Conclusion**: Nuclear power can cause pollution indirectly.

4. **Evaluate Fossil Fuels**:
- Fossil fuels (like coal, oil, and natural gas) release a high amount of nitrogen oxides and carbon dioxide when burned.
- These emissions contribute to air pollution and phenomena like acid rain.
- **Conclusion**: Fossil fuels cause pollution.

5. **Evaluate Renewable Energy Sources**:
- Renewable energy sources such as solar, wind, and hydroelectric power do not produce emissions that contribute to air pollution.
- They harness natural processes and are considered clean energy sources.
- **Conclusion**: Renewable energy sources do not cause pollution.

6. **Final Decision**:
- Based on the evaluations, the only option that serves as a source of energy without causing pollution is renewable energy sources like solar or wind energy.

### Answer:
The answer to the question is renewable energy sources (e.g., solar or wind energy).

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