![]() ![]() Fact sheet page: 1 2 3 4 5 6 7 8 9 Quiz 1999 Quiz 2000 The Ozone layer — what you can doSun Protection Tips
To protect the ozone layer
Recovery of the Ozone LayerEven though we have greatly reduced the amount of ozone-depleting chemicals which are being released into the atmosphere, the ozone layer is not expected to recover for many decades. This is because these chemicals remain in the atmosphere for long periods of time — up to 100 years or more. If all countries comply with the terms of the Montreal Protocol, we should eventually see improvements in the ozone layer. However, scientists are uncertain how the rising levels of greenhouse gases and other pollutants may affect ozone loss, particularly in the Arctic. Ozone depletion over the earth's poles may well become worse before it gets better. The UV index — a Canadian success storyOn May 27, 1992, Canadians tuned into their morning weather The UV Index scale gives us another way to understand ozone depletion. UV is a natural part of the sun's rays. Even before human activities began to deplete the ozone layer, natural levels of UV over southern Canada in the summer would typically reach about 8. They can also sometimes reach 9 and even 10. ![]() ![]() Fact sheet page: 1 2 3 4 5 6 7 8 9 Quiz 1999 Quiz 2000
Created :
2002-08-23
Modified :
2004-03-05
Reviewed :
2004-03-05
Url of this page : http://www.msc.ec.gc.ca
/cd/factsheets/ozone/page9_e.cfm ![]() The Green LaneTM, |
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