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Hybrid-electric vehicles (HEVs) come with environmental trade-offs.

Which of the following is a disadvantage of hybrid-electric vehicles?


Materials like lanthanum are required for the batteries of HEVs; these are scarce and must be mined.


HEVs are prone to frequent malfunctions because of their two engine systems.


Switching from internal combustion engines to HEVs will result in significant job losses in the petroleum sector.


HEVs depend on hydrogen fuel cells, and the infrastructure for hydrogen fuel stations is extremely limited.


HEVs will increase the demand for electricity production.

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