Many scientists are concerned that the Ogallala aquifer in the United States is being depleted at an alarming rate. What would most likely be a major effect of this aquifer running dry? Many crops would die because irrigation water would be limited. The water cycle would come to a halt in the area. Farmers would have to water crops with salt water. Most people in the United States would not have drinking water.

The Ogallala aquifer is a critical source of water for irrigation in the United States, particularly in the Midwest. If the Ogallala aquifer were to run dry, the most likely major effect would be that many crops would die because irrigation water would be limited. This would have a significant impact on agriculture and the economy in the region. The other options provided are not as likely. The water cycle would not come to a halt in the area, farmers would not have to water crops with salt and most people in the United States would still have access to drinking water from other sources.