http://www.thenaturalhouse.co.uk/2007/07/24/second-workshop/ The Natural House is an art & architecture project introducing CBT (clay built technique) in England. CBT is modern, sustainable and carbon neutral technique of building houses / buildings using primary materials such as, clay, straw and water. Thu, 09 Sep 2010 22:58:15 +0000 http://wordpress.org/?v=2.2