objective: section 18-8 to 18-9 describe stratospheric ozone depletion and solutions to protect the...
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Objective: Section 18-8 to 18-9Objective: Section 18-8 to 18-9
Describe stratospheric ozone depletion and solutions to protect the ozone layer.
Describe stratospheric ozone depletion and solutions to protect the ozone layer.
Ozone SchmozoneOzone Schmozone
What is ozone?
Do I really need to care?
What is ozone?
Do I really need to care?
Ozone Formation in the StratosphereOzone Formation in the Stratosphere
ImportanceImportance Absorbs UV Terrestrial life
Absorbs UV Terrestrial life
Ozone Depletion in the StratosphereOzone Depletion in the Stratosphere
Fig. 18-26 p. 473Fig. 18-26 p. 473
DepletionDepletion O3 + CFCs → O2 + CFCs + O O3 + CFCs → O2 + CFCs + O
CFCs destroying ozone animation.
Ozone Depleting ChemicalsOzone Depleting ChemicalsChlorofluorocarbons (CFCs)Chlorofluorocarbons (CFCs)HalonsHalonsMethyl bromideMethyl bromideCarbon tetrachlorideCarbon tetrachloride
Methyl chloroform
Methyl chloroform
Hydrogen chloride
Hydrogen chloride
Seasonal Thinning at the PolesSeasonal Thinning at the PolesOzone thinning (hole)Ozone thinning (hole) Polar vortexPolar vortex
Fig. 18-30 p. 475Fig. 18-30 p. 475
Reasons for ConcernReasons for Concern Increased incidence and severity of sunburn Increased incidence and severity of sunburn
Increase in eye cataracts Increase in eye cataracts Increased incidence of skin cancer Increased incidence of skin cancer
Immune system suppression
Immune system suppression
Increase in acid deposition
Increase in acid deposition
Lower crop yields and decline in productivity
Lower crop yields and decline in productivity
Solutions: Protecting the Ozone LayerSolutions: Protecting the Ozone Layer
CFC substitutesCFC substitutesTechnofixes Technofixes Montreal
Protocol
Montreal Protocol
Fig. 18-33 p. 479Fig. 18-33 p. 479
Solutions: Protecting YourselfSolutions: Protecting YourselfCommon
sense
Common sense
GeneralizationGeneralization What chemicals play a major role in ozone
thinning?
Summarize the destruction of stratospheric ozone.
What is the best solution for preventing ozone thinning?
What chemicals play a major role in ozone thinning?
Summarize the destruction of stratospheric ozone.
What is the best solution for preventing ozone thinning?
Objective: Section 18-8 to 18-9Objective: Section 18-8 to 18-9
Describe stratospheric ozone depletion and solutions to protect the ozone layer.
Describe stratospheric ozone depletion and solutions to protect the ozone layer.