Which of the following sources of energy causes environmental pollution?

Options

A. Hydal energy
B. Solar energy
C. Wind power
D. Fossil fuels

Answer

To determine which source of energy causes environmental pollution, we can analyze each option provided: hydral energy, solar energy, wind power, and fossil fuel.

### Step-by-Step Solution:

1. **Understanding Energy Sources**:
- Energy sources can be categorized into renewable and non-renewable sources. Renewable sources include hydral energy, solar energy, and wind power, while non-renewable sources include fossil fuels.

2. **Analyzing Each Energy Source**:
- **Hydral Energy**: This energy is generated from water flow, typically in hydroelectric power plants. It is considered a renewable source and generally does not cause pollution during operation, although the construction of dams can have ecological impacts.
- **Solar Energy**: This energy is harnessed from sunlight using solar panels. It is a clean and renewable source of energy that does not produce pollution during its operation.
- **Wind Power**: This energy is generated using wind turbines. Like solar energy, it is renewable and does not emit pollutants during operation.
- **Fossil Fuels**: This category includes coal, oil, and natural gas. Burning fossil fuels releases pollutants such as carbon dioxide, sulfur dioxide, and particulate matter, contributing significantly to air pollution and climate change.

3. **Conclusion**:
- Among the options provided, fossil fuels are the only source of energy that causes environmental pollution due to the emissions produced when they are burned for energy.

### Final Answer:
**Fossil fuel causes environmental pollution.**

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