AP Environmental Science Quiz
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ENERGY RESOURCES AND CONSUMPTION
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A hydrogen fuel cell vehicle emits only water; which statement best addresses "hidden" emissions?
A
Upstream emissions can occur during hydrogen production, compression, and transport, so full environmental impact requires life-cycle assessment.
B
Hidden emissions are impossible because water is not a greenhouse gas and therefore cannot affect climate in any way.
C
Hidden emissions occur only from painting the vehicle; fuel choice has no effect on upstream or downstream impacts.
D
Hidden emissions are larger for hydrogen only because fuel cells emit CO
2
_2
2
during start-up and shut-down cycles.
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