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Why isn't air travel based on hydrogen popular today? A.Hydrogen is very expensive B. Hydrogen is difficult to find C. Hydrogen is flammable and dangerous D. Hydrogen is to…

Why isn't air travel based on hydrogen popular today? A.Hydrogen is very expensive B. Hydrogen is difficult to find C. Hydrogen is flammable and dangerous D. Hydrogen is to…
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Why isn't air travel based on hydrogen popular today? A.Hydrogen is very expensive B. Hydrogen is difficult to find C. Hydrogen is flammable and dangerous D. Hydrogen is too cold for travelers to stand on long trips

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User Maartenba
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5 votes
C.hydrogen is difficult to find
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User Alderven
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the answer is c. hydrogen is flammable and dangerous
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User Leerob
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