Plug-in hybrids run for a longer time on electricity and so are less polluting than regular hybrids.
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Having read the above passage, choose the right answer to the following question (choices are its diesel engine or its battery backup power? ):


Would a diesel powered submarine release less pollution if it were running on its diesel engine or its battery backup power??
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multiple-choice question answering
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Plug-in hybrids run for a longer time on electricity and so are less polluting than regular hybrids.
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Having read the above passage, choose the right answer to the following question (choices are its diesel engine or its battery backup power? ):


Would a diesel powered submarine release less pollution if it were running on its diesel engine or its battery backup power??
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its battery backup power?