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International Ozone Day 2000

September 16 is the International Day for the Preservation of the Ozone Layer. This year's theme is "Save Our Sky: Protect Yourself and Protect the Ozone Layer".

The day was designated by the United Nations in recognition of the anniversary of the signing of the 1987 Montreal Protocol on Substances that Deplete the Ozone Layer. The Protocol, the first international agreement of its kind, sets a global precedent for safeguarding both the environment and human health.

To mark the occasion, Environment Canada has designed a new quiz to test your knowledge on the ozone layer, ozone depletion and UV radiation. Can you get 1,000,000 points?

1. Ozone is found throughout the whole atmosphere but is concentrated in the:
   
   a. troposphere (0-10 km)
   b. stratosphere (10-50 km)
   c. mesosphere (50-80 km)
   d. cryosphere (5-15 km)
   

   100 points

2. There is "good" ozone and "bad" ozone in the atmosphere. The "good" ozone in the stratosphere protects us from:
   
   a. snow in winter
   b. rain in summer
   c. UVB radiation during the whole year
   d. Tax man in March
   

   200 points

3. The ozone hole, which has occurred over the Antarctic each spring, develops due to:
   
   a. meteorological conditions and high concentrations of industrial chemicals
   b. snow and glaciers conditions
   c. no sunlight, clouds and snow
   d. climate change and intense UV radiation
   

   400 points

4. The Montreal Protocol on substances that deplete the ozone layer was signed in what year:
   
   a. 1967
   b. 1996
   c. 1997
   d. 1987
   

   800 points

5. How many countries have ratified the Montreal Protocol:
   
   a. 120
   b. 23
   c. 173
   d. 191
   

   1000 points

6. Since the signing of the Montreal Protocol, there have been four amendments to strengthen the Protocol in eliminating ozone-depleting substances. Where were the amendments signed?
   
   a. Tokyo, Sydney, Mexico, and Paris
   b. Toronto, Sudbury, Winnipeg and Vancouver
   c. London, Copenhagen, Montreal and Beijing
   d. Vienna, Washington, Nairobi, and Moscow
   

   2000 points

7. The Montreal Protocol limits production and consumption of ozone depleting substances. How do we in Canada get rid of these industrial chemicals?
   
   a. Slowly vent them into the atmosphere where they are slowly broken down. b. Burn them. c. Recycle them d. Store them

   4000 points

8. Depletion of the ozone layer causes a corresponding increase in UV radiation. For every 1 percent decrease in the ozone layer, what is the increase in UV radiation at the surface of the earth?
   
   a. 5%
   b. 10%
   c. 1.2%
   d. 0%
   

   8000 points

9. This year, current measurements indicate that the ozone hole over the Antarctic has reached record proportions. How large was the ozone hole (ozone depletion area) on Sept 3, 2000?
   
   a. 11 million square km
   b. 18 million square km
   c. 27.2 million square km
   d. 28.3 million square km
   

   16,000 points

10. The record size of this year's ozone hole indicates how frail the ozone layer is. Although the hole is not expected to expand much further, ozone values will continue to fall in the interior. How low are ozone values expected to fall in the lower stratosphere within the ozone hole.
    
    a. 20 to 40 percent
    b. 50 to 70 percent
    c. 70 to 80 percent
    d. 80 to 100 percent
    

    20,000 points

11. Last winter, scientists from Canada, Europe, Russia, Japan and the United States studied Arctic ozone levels. How severe was the ozone depletion detected in the Arctic ozone levels at certain altitudes this past winter and spring.
    
    a. 30 percent
    b. 40 percent
    c. 60 percent
    d. 80 percent
    

    40,000 points

12. Although the Montreal Protocol curtailed production of ozone depleting substances, the peak concentration of chemicals in the stratosphere is only now being reached. A recovery will only occur if all nations implement the controls of the Montreal Protocol. When do scientists expect a recovery in the ozone to occur?
    
    a. 2010
    b. 2020
    c. Possibly late this century.
    d. Never
    

    80,000 points

13. The bromine released from methyl bromide is about 40 times more damaging to the ozone layer than chlorine on molecule-to-molecule bases. Under the Montreal Protocol methyl bromide in developed countries will be phased out in 2005. What is methyl bromide used for?
    
    a. To sterilize soil in fields and greenhouses.
    b. To kill pests on fruit, vegetables, and gain before export.
    c. To fumigate soils, structures and agriculture commodities.
    d. All of the above.
    

    200,000 points

14. What was the last country to ratify the Montreal Protocol?
    
    a. Burkina Faso
    b. Haiti
    c. Canada
    d. Finland
    

    500,000 points

15. What can I do to "save the sky: Protect myself and save the ozone layer"?
    a. Be an ozone-friendly consumer.
    b. Be an ozone friendly homeowner.
    c. Find shade, wear sunscreen and protective clothing
    d. All of the above.
    

    1,000,000 points

Check your answers.

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