Bruce King has been a practicing structural engineer for forty years, designing buildings of every size and type around the world. He is the founder and director of the Ecological Building Network (EBNet) and author of the ASTM international building standard for earthen construction, The New Carbon Architecture, and three other books.

Chris Magwood has been designing and building carbon positive buildings for twenty-five years. Since 2011 he has been doing this work at Endeavour Centre - The Sustainable Building School where he currently leads the Builders for Climate Action project, designing tools and policies to support carbon-smart architecture. He is the author of seven books about sustainable building materials and techniques and is the editor of the Sustainable Building Essentials series.