Paleo dieters need soil and soil microbiotia

http://www.ncbi.nlm.nih.gov/m/pubmed/24401109/

http://www.ncbi.nlm.nih.gov/m/pubmed/21135322/?i=44&from=lowry%20christopher&sort=PublicationDate/

http://civileats.com/2014/06/05/the-soil-will-save-us-a-manifesto-for-restoring-our-relationship-with-the-land/

Should we need to wash our veggies?