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Old 27th Oct 2020, 19:27
  #12 (permalink)  
ericoides
 
Join Date: Jun 2009
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Whatever they come up with, as well as being carbon neutral, it must satisfy two criteria:
  1. No, or little, noise.
  2. No contrails, such as currently disfigure our skies like some sort of careless straight-line graffiti.
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