1. The concentration of which gas can be reduced by preventing forest depletion?
   1. carbon dioxide (CO₂)
   2. nitrous oxide (N₂0)
   3. Oxygen (O₂)
   4. Methane (CH₄)
   5. Water Vapor

   
   
   

2. Rain forests produce which of these greenhouse gases?
   1. carbon dioxide (CO₂)
   2. nitrous oxide (N₂0)
   3. Oxygen (O₂)
   4. Methane (CH₄)
   5. Water Vapor

   
   
   

3. What is the approximate average temperature of the Earth?
   1. 40 degrees F
   2. 48 degrees F
   3. 58 degress F
   4. 65 degress F
   5. room temprature (72)

   
   
   

4. Which gas does not contribute to global warming?
   1. Carbon Dioxide
   2. Carbon Monoxide
   3. Methane
   4. Water Vapor
   5. Nitrous Oxide

   
   
   

5. Approximately what fraction of the total greenhouse effect is caused by Water Vapor?
   1. 1/10
   2. 1/4
   3. 1/2
   4. 2/3
   5. 9/10

   
   
   

6. What is the approximate increase in global surface temperature in the past century?
   1. no increase
   2. 1/2 degree F
   3. 1 degree F
   4. 2 degree F
   5. 5 degree F

   
   
   

7. What is the expected increase in the risk of infection to world populations due to global warming?
   1. 10 percent
   2. 25 percent
   3. 35 percent
   4. 50 percent
   5. 70 percents

   
   
   

8. In 1994, how many tons of carbon dioxide were emitted by the average person in the United States?
   1. 2
   2. 5
   3. 10
   4. 20
   5. 50

   
   
   

9. Coal produces twice as much carbon dioxide per unit of heat as natural gas.
   1. True
   2. False

   
   
   

10. How much carbon is put into the atmosphere from use of 1 gallon of gasoline?
    1. less than one ounce
    2. about 1 pound
    3. about 3 pounds
    4. about 5 pounds
    5. about 20 pounds

    
    
    

11. How much carbon is put into the atmosphere on average in the U.S. from "on the grid" use of 1 kilowatt hour of electricity
    1. less than one ounce
    2. about 5 ounces
    3. about 1 pound
    4. about 2 pounds
    5. about 4 pounds

    
    
    Note: Typical driving uses 50 gallons a month 250 pounds of carbon.

    Monthly household energy use is 2000 KWH 10 pounds of carbon.

12. The concentration of carbon dioxide in the atmosphere hasn't been this high in over:
    1. 200 years
    2. 2000 years
    3. 20000 years
    4. 200,000 years
    5. 500,000 years

    
    
    

13. To stabilize atmospheric concentrations of CO₂, per capita emissions (for a world population of 10 billion) would need to be:

    1. an ounce per person per day
    2. two pounds per person per day
    3. one pound per person per day
    4. five pounds per person per day
    5. thirty pounds per person per day

    
    
    

14. Per capita emissions of carbon (from fossil fuels) in the U.S. are presently:

    1. about 5 pounds per person per day
    2. about 10 pounds per person per day
    3. about 20 pounds per person per day
    4. about 30 pounds per person per day
    5. over 50 pounds per person per day