-> And now, part two:
->
-> My physicist husband reminds me that since trees respirate, they are 
natural
-> evaporative coolers.  They put out moisture, and the moisture evaporates, 
so
-> it cools the air.
Now we are talking.  And is AZ that probably really works with the low 
humidity
they have.  Around here I don't think we get much evaporative cooling effect.
When the humidity is 90+ you don't tend to get much evaporative cooling 
effect.
-> I still think there is an extra cooling effect because tree branches don't
-> block the breeze as much as a solid man-made shade; this allows our own
-> human evaporative cooling more chance to work. ;-)
Well no one said the manmade shade had to be solid!  It could just be a roof
without any walls.
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