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Ozone Depletion
According to scientists, CFCs are supposed to last for more than 100 years, in the
Biosphere
Stratosphere
Troposphere
Hydrosphere
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Ozone Depletion
HCFCs can be broken down in lower atmosphere, before ascending into the
Stratosphere
Troposphere
Ionosphere
Thermosphere
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Ozone Depletion
When was ‘Montreal protocol’ signed by 24 nations?
1988
1985
1987
1984
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Ozone Depletion
Spray cans containing chemical substance known as
Feron I
Feron II
Cl
Phosphorous
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Ozone Depletion
In 1992, representatives from nearly 180 nations, met in
Rio de Janerio
Brazil
USA
Canada
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Ozone Depletion
Greatest decline, being observed over America and Argentina, ranges from 5% to
0.08
0.1
0.09
0.01
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Ozone Depletion
What does ozone depleting chemical, HGs, contributing to ?
Global Warming
Eutrophication
Deforestation
Urbanization
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Ozone Depletion
When did United states ban CFCs usage in spray cans?
1975
1978
1976
1970
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Ozone Depletion
What gases are involved in ozone depletion ?
Nitrogen
Chlorine and Bromine
Chlorofluorocarbons (CFCs) and Ozone Depleting Substances (ODS)
Both B and C
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Ozone Depletion
CFCs can destroy;
100,000 ozone molecules
1000 ozone molecule
10,000 ozone molecules
20,000 ozone molecules
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