What you really need is the water to grow the grains that feed the cattle... i remember reading an article about U.S. grain producers using Tons (literally) of scarce water to grow grains/food.. that get sent overseas or are used for meat going overseas. So essentially our food goods and our water is leaving.
So we are to do without that food and water to supply China, because more people are also moving here from other countries across the border? It doesn't make sense.