Risers to produce food in a backyard (Almar B. Autida – The Philippines)

Riser with bottles and cans - Almar B. Autida - A splendid technique to produce a maimum of fresh food on a minimum of space (Photo Almar B. Autida)

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Willem Van Cotthem

Honorary Professor of Botany, University of Ghent (Belgium). Scientific Consultant for Desertification and Sustainable Development.