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1. We pay electric companies to separate the positive and negative charges for us, so that we have electrical energy at our disposal.

2. A passive solar house is also cheaper to build than an active solar house, which needs mechanical or electrical devices to increase the efficiency of solar energy.

3. More efficient electrical appliances can provide convenience without a huge increase in energy consumption.

4. Some people have criticized department stores and supermarkets for wasting energy by leaving electrical home appliances switched on while on display.

5. In this treatment, electrical energy enters the brain through the vagus nerve in the neck.

6. It will save more energy in the sphere of electrical machinery and optimize energy systems, so as to improve the efficiency of both.

7. The vehicle's green awning can generate electrical power from solar energy.

8. The second priority is increasing the energy efficiency of electrical devices and other household equipment.

9. This strategy can be of special importance to makers of home appliances and electrical goods, including energy saving bulbs.

10. " Consumers should know whether the electrical appliances they buy are wasting energy, " he said.