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Re: your mail

Forget one part of the question.  Have not heard of alternatives to 
urethane foams in 
widespread commercial use but the aerogels were talked about a few years 
back.  They are essentially foamed sand.  When the EPA announced its 
award for the Green refrigerator, Greenpeace held an counter 
demonstration in DC of their candidate which used pentane (or some other 
light hydrocarbon) as the refrigerant.  I believe that fridge had aerogel 
or another alternative insulation.  Try your Greenpeace contacts or visit 
their net site.

Bill Bilkovich, EQC
3651 Cherry Bluff Ln
Tallahassee, Fl 32312-1001
Fax 904-894-2480 Voice 904-894-2780
bilko@vistech.net