Graeme North, the pre-eminent practitioner of eco-architecture in New Zealand, been building with rammed earth, mud brick, cob and hay bales for over 30 years in New Zealand.
And the pictures of the homes look pretty cool.
Although the idea of mud homes reminds me of Thursdays episode of My Name Is Earl where the guys go and live in an environmentalist commune for a week, where the homes were made out of cow dung and stray.
Not too appealing. Especially when they said they had to rebuild the walls every time it rained. Ha.