An 'ARE YOU SMARTER THAN AL GORE?' energy quiz

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3. Stand-by power – energy consumed by appliances turned off but plugged in – accounts for how much of all US residential energy use?

a) 1 percent

b) 3 percent

c) 5 percent

Previous answer:

2. For every two minutes a car idles, it uses the same amount of fuel it takes to drive

c) a mile

The California Energy Commission's Consumer Energy Center offers this rule of thumb: "If you're in a drive-through restaurant/business line or waiting for someone and you'll be parked and sitting for 10 seconds or longer, turn off your car's engine. For every two minutes a car is idling, it uses about the same amount of fuel it takes to go about one mile."

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