Using complete sentences, explain the impact of large-scale agriculture in the southwestern United States on our water supply.

Answer:

Responses may vary but should include some or all of the following information: Large-scale agriculture in this area requires irrigation. The irrigation is provided by dams, which divert water from the Colorado River. Silt is no longer carried downstream, and 90% of the river is diverted for irrigation. The lack of water downstream leads to a scarcity of drinking water.