Answer:
pollution, arid lands and population pressure on the water source.
Step-by-step explanation:
Overall, population growth in the Middle East now averages a staggering 3 percent annually, which can only increase both the pressure on already exhausted water resources and the pollution of the water. Also Agriculture uses 85 percent of water in this region. It is common to misuse land by heavy irrigation in the Middle East. In the area droughts are more frequent, and contribute to the changing landscape.