Question

What is the best way to save energy?

• A. Lowering the thermostat a few degrees
• B. Using a fan instead of turning on the air conditioner in home
• C. An energy-efficient light bulb turns almost all of the electricity it uses into light
• D. All of them

Answer 1

The correct option is D All of them

By setting the thermostat at the most comfortable temperature is more valuable to save energy. The Department of Energy estimates savings of about $1$% for each degree of thermostat adjustment per $8$ hours, and recommends turning thermostat back to $7-8$ degrees from their normal settings for $8$ hours per day to achieve annual savings of up to $10$%.

When feeling not that hot, the fan can be turned on instead of an air conditioner as fan conserves more energy.

Also as energy efficient light bulb turns almost all of the electricity it uses into light thereby conserving energy.