How does proper insulation of home save energy?
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By properly insulating a home, it is possible to maintain a comfortable temperature inside. It will reduce the cost of heating devices in winter and cooling devices in summer.
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Which of the following device is most efficient for lighting purpose:LED, CFL, Fluorescent tube light, Electric bulb.
State two ways to save energy.
How is CFL better than a usual bulb ?
What is indicated by the different number of stars on an electric appliance?