Advantage or disadvantage

1.Electrical energy makes appliances work so we can live more comfortably.

2.Siren in an ambulance is used to indicate that an emergency is going on.

3.Light energy is useful nowadays in sending messages and videocalls.

4.Turning on all the lights at home can save electricity even when you are alone in a room.

5.The sun’s radiation helps activate vitamin D inside the body.
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