Environmental Engineering Reference
In-Depth Information
5. Which statement about the inorganic carbon cycle is NOT
correct?
a. Volcanos emit 0.15 Gt of carbon per year
b. If the temperature of the earth increases, the weathering
reaction increases and hence more CO 2 reacts
c. Without rain, the temperature of the earth would decrease
d. Without tectonic motion, the atmosphere would become
depleted of CO 2
6. The ratio of anthropogenic to natural emissions of CO 2 is
a. 1
b. 6
c. 10
d. 60
e. 100
7. If we emit 1 Gt of CO 2 , where will the CO 2 go?
a. atmosphere 45%, biosphere 30%, and ocean 25%
b. atmosphere 30%, biosphere 45%, and ocean 25%
c. atmosphere 25%, biosphere 30%, and ocean 45%
d. atmosphere 45%, biosphere 25%, and ocean 30%
8. The total amount of carbon we have emitted in the form of
CO 2 since 1850 is
a. 100Gt
b. 200Gt
c. 500Gt
d. 1,500Gt
9. If we decide to use 20% of the reserves of the fossil fuels,
what is the maximum CO 2 concentration predicted to be in the
atmosphere?
a. 300ppm
b. 700ppm
c. 1,000ppm
d. 1,500ppm
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