Abstract
ABSTRACT Irrigation is multisecular, being necessary for the people of antiquity and across centuries for their food needs. The article proposes an overview of the various irrigation systems in several countries across the globe, from the European continent to the Middle East, and from South America to Far East Asia. I analyse the evolution of these techniques, and the factors that allowed them to be maintained, to disappear, or to deteriorate. I also question the new methods of irrigation and their effects on nature and ecosystems in the context of global warming and the erosion of biodiversity, especially in this period of the opening of the COP27 in Sharm El-Sheikh, Egypt.
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