Problem 1
What is a Dobson unit? How is it used in relation to atmospheric ozone levels?
Problem 3
Describe the process by which chlorine becomes activated in the Antarctic ozone-hole phenomenon.
Problem 4
What are the steps in Mechanism II by which atomic chlorine destroys ozone in the spring over Antarctica?
Problem 6
What are two effects on human health that scientists believe will result from ozone depletion?
Problem 7
Define what is meant by a tropospheric sink.
Problem 8
Explain what HCFCs are, and state what sort of reaction provides a tropospheric sink for them. Is their destruction in the troposphere \(100 \%\) complete? Why are HCFCs not considered to be suitable long-term replacements for CFCs?
Problem 10
Chemically, what are halons? What was their main use?
Problem 11
What gases are being phased out according to the Montreal Protocol agreements?
