From: dlzc1@cox.net   
      
   Dear Dr. Jai Maharaj:   
      
   On Friday, December 8, 2017 at 11:57:16 AM UTC-7, Dr. Jai Maharaj wrote:   
      
   Well, I liked this one (for heat transfer to space outside the range of most   
   greenhouse gases, nothing to do with zinc):   
   https://spectrum.ieee.org/energywise/green-tech/solar/efficient-   
   irconditioning-by-beaming-heat-into-space   
   ... using hafnium oxide (and more).   
      
   And with zinc having a low vapor pressure, couldn't you use vacuum   
   distillation?   
      
   David A. Smith   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)