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d.
c.
5. Mineral trapping of CO 2 occurs on a time scale of
a. 1 year
b. 10 years
c. 100 years
d. 1,000 years
6. How many years of current CO 2 emissions can maximally be
stored in oil and gas fi elds?
a. 1
b. 10
c. 30
d. 100
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