The evidence that the soils of Mesopotamia became saltier The farmers switched from growing wheat to growing barley.
Eutrophication units off a series responses within the environment, starting with an overabundance of algae and vegetation. The excess algae and plant matter ultimately decompose, generating huge quantities of carbon dioxide. This lowers the pH of seawater, a process referred to as ocean acidification.
As salt-rich groundwater rose and floor water evaporated, mineral salts were constructed in the soils. Farmers switched to extra salt-tolerant grains like barley, but the more difficult they farmed, the less they harvested. After years, the once-fertile land of southern Mesopotamia become barren.
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