http://www.thenaturalhouse.co.uk/2007/07/10/greenprint/ 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. Tue, 07 Sep 2010 21:42:55 +0000 http://wordpress.org/?v=2.2