Phoenix is possible as a major metropolis by the cheap water supplied by the Colorado River. There is a small river that runs through Phoenix, and was the reason for it being established initially, but it was with the engineering from the Hoover Dam that the whole US South West became a viable human urban habitat.
Golf course in Mesa, AZ Many of the private and public areas are saturated with water; such as golf courses and parks. Water being cheap means that automated irrigation is possible. It is in direct contrast to the Phoenix climate which stays above 40C (103F) often for weeks and months at a time during summer. It is enough to wilt the toughest grasses. (more)
Golf course in Mesa, AZ




