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The device shown is a wind turbine. Wind turbines work on a simple principle. The wind turns the propeller-like blades of a turbine around a rotor, which spins a generator, which creates electricity.
Advantages of using coal-power station to generate electrical energy
Coal is in abundance in many places
It is relatively easy and inexpensive to convert coal into energy
Coal is easy to store
Disadvantages of using coal-power stations to generate electrical energy
It is a non-renewable energy source.
It generates greenhouse gases and carbon dioxide thus polluting the environment.
It increases global warming
It contributes to atmospheric/air pollution and acid rain
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