the offgassing non-issue. Tires are hazardous in piles not Earthships

Global Earthship Overview40 years of research and development of self-sufficient housing made from recycled materials.

Development of Earth friendly and people friendly community living concepts that require little or no mortgage payment and no utility bills.

There is an extensive study by the University of Wisconsin-Madison that was presented to us by the state of New Mexico.

The cover page of which is here. It can be obtained through the University of Wisconsin-Madison, Madison, Wisconsin, 53706.
It would probably cost something to get it.
http://www.earthship.com/offgassing

" Do something wonderful, people may imitate it. "
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" Bicycle is a *Proof of Intelligent Life on Earth* "