Building with tires is good for the environment - but I'm not sure about the homeowners. As the tires slowly break down they're releasing chemicals into the home. If you build with tires be sure to seal them completely for at least a partial barrier of protection.
". . . the Earthship is the epitome of sustainable design and construction. No part of sustainable living has been ignored in this ingenious building." Earthships can be built in any part of the world, in any climate and still provide electricity, potable water, contained sewage treatment and sustainable food production.