>Al,
>
>Certainly not ship. Water friction is a lot larger than air friction.
>
>>Hmm, I don't think so. My understanding:
>>
>>Bicycle > Ship > Rail > anything else
I'm assuming you're measuring efficiency as energy used per tonne-kilometer of goods moved. Ships are very good.
As for jets - if they were so efficient, we'd be shipping grain and coal by jet ;)
Regards. Al
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