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1. Letting the water run while brushing your teeth can waste ______ gallons of water per minute.
    a) 1
    b) 2
    c) 3
    d) 4

2. Every year, Americans dispose of ______ tons of leaves and grass clippings.
    a) 120,000
    b) 8 million
    c) 12 million
    d) 24 million

3. How many aluminum cans did Americans throw away in 2001?
    a) 50,000
    b) 50 million
    c) 50 billion
    d )50 trillion

4. The furnace/air conditioner uses more energy than anything else in the home. What is the second greatest source of home energy use?
    a) Home appliances
    b) Indoor and outdoor lighting
    c) Hair dryers
    d) TV

5. On what day is Earth Day celebrated?
    a) January 21
    b) April 22
    c) July 4
    d) October 12

6. An annual mower tune-up can reduce mower emissions up to 50 percent. Out of the United States' 66 million mower-owning families, how many perform no annual tune-up?
    a) 40 million
    b) 400,000
    c) 40,000
    d) 4

7. Recycling one aluminum soda can can save as much electricity as it would take to operate a TV for ______ hours.
    a) 1
    b) 2
    c) 3
    d) 4

8. ______ are the leading source of household water use indoors.
    a) Inefficient toilets
    b) Showers and baths
    c) Kitchen sinks
    d) Dishwashers

9. By packing their lunch in reusable bags or lunch boxes instead of a paper bag, Americans can save _______ trees each year.
    a) 2 billion
    b) 2 million
    c) 200,000
    d) 20,000

10. The used motor oil from one oil change can contaminate ______ gallons of drinking water.
    a) 1
    b) 100
    c) 1,000
    d) 1,000,000

Answers: 1- d, 2-d, 3-c, 4-a, 5-b, 6-a, 7-c, 8-a, 9-b, 10-d