Regarding the Odds ‘n Sods entry last month: Owen Geiger has several earthbag shelter designs that are inexpensive but labor intensive and that are an option for radiation protection. Examples Earthbag Survival Shelter September 20, 2010 by Owen Geiger [I would like to see this design in an above ground configuration.] Triple Dome Survival Shelter April 12, 2011 by Owen Geiger Mother Earth News Earthbag Dome July 15, 2009 by Owen Geiger Step-By-Step Earthbag Building [YouTube Video Play list] Earthbag Natural Building, Last updated on Jul 1, 2014 http://www.earthbagstructures.com/basics/basics.htm