Half a croissant, on a plate, with a sign in front of it saying '50c'
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Energy source indicator

Why not ?
 
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A simple coloured symbol on vehicle licence plates indicating the energy source employed (Gasoline/diesel/electric/hydrogen /over-unity device/Mr. Fusion generator).
8th of 7, Mar 04 2017


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Annotation:







       //Why not // And, at the same time, why?
MaxwellBuchanan, Mar 04 2017
  

       So those using sticks of dynamite can be given the appropriate distance.
wjt, Mar 05 2017
  

       A school bus powered by the child passengers pedaling would be classified as corn flake powered in the morning and peanut butter jelly sandwich powered in the afternoon. So a yellow flake and sandwich symbol on the bumper.
popbottle, Mar 05 2017
  


 

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