Half a croissant, on a plate, with a sign in front of it saying '50c'
h a l f b a k e r y
This would work fine, except in terms of success.

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wind powered hydrogen blimp

Refill cluster blimp with h2 from towed generator in sea
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Cluster balloon blimp automatically sends down emptied balloons to be refilled by towed generator, creating electricity from opposing wind vs sea currents, and filling the emptied balloons with hydrogen in a hullaballoon like process.
pashute, Jul 09 2013

Blimp in desert http://photos.wikim...02/15/78/62_big.jpg
No h2o here... (Ketziot - mistakenly marked as Dimona...) [pashute, Jul 09 2013]

Solar powered blimp http://www.celsias....rgo-fast-and-clean/
with picture fit for this idea... [pashute, Jul 09 2013]

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