Half a croissant, on a plate, with a sign in front of it saying '50c'
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Smoke ring exhaust

Making pollution work for you.
  (+20, -1)(+20, -1)
(+20, -1)
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Modify the exhaust on smoky old trucks and buses to blow smoke rings.
Ling, Nov 16 2006

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       Gandolph would approve.   

       This is lovely and would create the motorway passtime of attempting to crawl your car through the smoke rings the truck in front leaves behind.
calum, Nov 16 2006
  

       + cool
xandram, Nov 16 2006
  

       This would be great entertainment during a traffic jam.
Jscotty, Nov 16 2006
  

       can i blow little shape with mine?
abhorsen1983, Nov 16 2006
  

       mmm doughnuts (+)
acurafan07, Nov 19 2006
  

       They could use biodiesel made from used doughnut fryers.
undata, Nov 20 2006
  
      
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