Look no further than the United Kingdom for buildings still in use dating back 600 years. Clay is generally available locally, which boosts local economy. It is also non- toxic both in chemical composition and in the processing of the materials. Clay is local and affordable. Clay is recyclable.
Clay preserves wood.
Clay is an excellent heat absorber. Clay can regulate indoor temperature swings. Clay can self regulate relative humidity indoors. Clay is excellent acoustical insulation. Clay is fireproof.