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Upside, better than lead which, via TEL, is accumulatively toxic. Not quite as bad as Beryllium or Mercury, but still multi-generational...Down-side, interesting contrails...Off-topic: Wasn't until I researched Boron for a SciFi story detail that I learned the element is remarkably rare. Created atom by atom via cosmic-ray spalling of eg Carbon, leached from volcanic minerals and ash and concentrated by hydro-thermal processes...IIRC, some's recently been found in the clay layers on walls of ancient Martian crater that once held a lake...
Upside, better than lead which, via TEL, is accumulatively toxic. Not quite as bad as Beryllium or Mercury, but still multi-generational...
Down-side, interesting contrails...
Off-topic: Wasn't until I researched Boron for a SciFi story detail that I learned the element is remarkably rare. Created atom by atom via cosmic-ray spalling of eg Carbon, leached from volcanic minerals and ash and concentrated by hydro-thermal processes...
IIRC, some's recently been found in the clay layers on walls of ancient Martian crater that once held a lake...
