The BBC Science & Environment warns that we will have to adapt to saltier varieties of food:

Growing crops in salt water is becoming necessary to overcome shortages of fresh water, say researchers writing in the journal Science.

They suggest the domestication of wild plants that grow in salty conditions could help reduce global food shortages.

It seems even harder to me to keep water properly salted, but maybe that is only problematic with fish and seaweed makes a happy house plant.