单选题
Save Energy at Home
On the average, Americans waste as much energy as two-thirds of the world"s population consumes. That is largely the
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of driving inefficient cars, using inefficient appliances (设备), and living and working in poorly insulated (隔热) buildings. Then what can you do to
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the situation?
Buy energy-efficient products. Buy new appliances or electronics of the highest energy-efficiency rating. New energy-efficient models may cost more initially, but have a lower operating
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over their lifetimes. The most energy-efficient models
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the Energy Star label, which identifies products
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use 20～40 percent less energy than standard new products. According to the EPA (美国环境保护署), the typical American household can save about $400 per year in
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bills with products that carry the Energy Star.
Switch to compact fluorescent bulbs (荧光灯). Change the three bulbs you use
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in your house to compact fluorescents. Each compact fluorescent bulb will keep half a ton of CO
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out of the air
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its lifetime.
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, compact fluorescent bulbs last ten times as long and can save $ 30 per year in electricity costs.
Set heating and cooling temperatures correctly. Check thermostats (温度自动调节器) in your home to make sure they are
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at a level that doesn"t waste energy.
Turn off the lights. Turn off lights and other electrical appliances such as televisions and radios when you"re not
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them. Install automatic timers for lights that people in your house frequently
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to turn them off when leaving a room.
Let the sun shine in. The cheapest and most energy—efficient light and heat source is often right outside your window. On
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days, open blinds (百叶窗) to let the sun light your home for free. Also remember that
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entering a room equals passive solar heating. Even on cold winter days, sun streaming into a room can raise the temperature by several
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.