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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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