HOUSE # 1 (20 room energy guzzling mansion) is outside of Nashville, Tennessee. It is the abode of that renowned environmentalist (and filmmaker) Al Gore.
HOUSE # 2 (model eco-friendly house) is on a ranch near Crawford, Texas. Also known as "the Texas White House," it is the private residence of the President of the United States, George W. Bush.
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Hmm... I hadn't seen those facts on Pres.Bush's home. I heard it was pretty neat, but it is interesting to see the whole story.
The first two are same articles from same source. Note the 2001 date of the original article in the last link below.