What is a wind mill ? Write two advantage and two limitations of using wind mills to generate electricity.

Explanation

### Step-by-Step Solution:

1. **Definition of a Windmill**:
- A windmill is a structure that converts wind energy into rotational energy. It uses large blades (often referred to as sails) that capture the wind's kinetic energy and turn it into mechanical energy, which can then be used to generate electricity.

2. **Advantages of Windmills**:
- **Low Operating Cost**: Once installed, windmills have relatively low operating costs compared to other forms of energy generation. They do not require fuel, and maintenance costs are generally low.
- **Renewable and Clean Source of Energy**: Wind energy is renewable, meaning it is sustainable and will not run out as long as the wind blows. Additionally, it is a clean source of energy, producing no harmful emissions during operation.
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