Juan Fernando GALLARDO LANCHO, Dr. in Sciences (University of Salamanca, Spain). He completed his specialization in Soil Sciences at the University of Nancy I (France) and the Geological Survey (Denver, Colorado). He worked at the C.S.I.C. (Salamanca, Spain) and at the University of Salamanca. He is now retired and working as an independent consultant. He works in Soil Science, Environmental Biogeochemistry, and Forest Ecology. He has more than 320 publications. He teaches lectures and courses at Latin American universities.