Amy’s Mom is replacing an old light bulb. The new light bulb uses less energy. Why is this a good thing?

In school you will have learned about electricity, switches, batteries and bulbs. It is very useful. Electricity powers bulbs and keeps our lights on. It runs our televisions and computers, and makes our fridges work. Electricity can be turned on and off by switches. Some things need batteries to work. Batteries store energy. But the energy in batteries does run out.