How does the author compare California and Mesopotamia?

In the text, the author mentions that California and Mesopotamia are similar because both regions are located in sunny, dry climates. This similarity is significant because it has influenced the development of both regions. For example, the sunny climate of Mesopotamia allowed the early inhabitants to develop a system of irrigation, which was essential for growing crops in the desert. Similarly, the sunny climate of California has made it a prime location for agriculture, with the state producing a wide variety of fruits, vegetables, and nuts.