prevented the occurrence of the sandstorms that now sweep all over the country."

Challenges to agriculture

The main crop-growing season in this region comes during the winter, and irrigation is needed at least monthly. However, neither the Tigris nor the Euphrates reaches its high water mark during the winter when farmers need water the most: the Tigris is fed by several tributaries in the Zagros mountains, and melting snows in the mountains lead to high water in April. The Euphrates, on the

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