Population and Nutrition Issues
The American diet is high in protein—particularly animal protein as opposed to plant protein. This diet requires huge amounts of grain and water to produce the same amount of nutrition that could be had by eating smaller amounts of meat and larger amounts of beans, seeds, nuts, tofu, oatmeal, and spinach. The issue is not that eating meat is bad (although overconsumption of red meat is associated with higher cholesterol and heart disease—and, of course, the animals may be mistreated and are being killed). The issue—or at least the economic issue—is that meat requires far more resources to produce a given amount of nutrition and provides more protein than people require.