1. Ozone Hole
a) scientists identified a thinning of the ozone layer over the artic
a1) in 1985
2. ODS
a) Ozone Depleting Substances
b) used in many products
b1) eg. CFC'S
c) produce halogen that destroy ozone
d) exists regulation of ODS
d1) but there continues to be severe ozone depletion
3. Destruction of Ozone
a) involves sunlight and polar stratospheric clouds
a1) so the process intensifies during spring time
4. Thinning of the Ozone Layer
a) over the Antartic
b) over the Europe
5. Ozone Levels
a) vary seasonlly
b) have been decreasing since 1970
6. Increased UV levels
a) are damaging
a1)human health
a2) air quality
a3) biological life
a4) certain materials like plastic
7. Human and animal health
a) increases of skin cancers
a1)immune deficiency disorders
b) biologically, affects ecosystems
b1) altering growth
b2) food chains
b3) biochemical cycles
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