Seawater intrusion is projected to cause additional risks in coastal aquifers, with severe impacts on agricultural productivity . While elevated atmospheric CO2 concentration could be positive for photosynthesis and cereal yields , the net outcome for agricultural production is highly uncertain . The projected yield losses will likely reduce farm revenues, for example, in Morocco , Egypt , Greece  and Israel . Given the growing water demand from agriculture and other users and the increasing competition over water resources, adaptation efforts for water supply need to be enhanced .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report