“Americans have no idea how wasteful these large mammals are,” Gracer says. “If you want to feed a lot of people, insects are the best choice in terms of getting the biggest bang for your buck.” Insects, he claims, are nutritious. Although they typically contain less protein by weight than beef or chicken—100 grams of giant water bugs or small grasshoppers, for example, have about 20 grams of protein, compared with 27 grams in the same amount of lean ground beef—they do have other benefits. For instance, grasshoppers contain just one-third of the fat found in beef, and water bugs offer almost four times as much iron. A 100-gram portion of the cooked caterpillar Usata terpsichore has about 28 grams of protein. In their dried form, as they are commonly sold in Africa, insects such as grasshoppers may contain up to 60 percent protein.
Raising insects has a low impact on the environment. They require little water, perhaps because they obtain much of their moisture from their food. It takes 869 gallons of water to produce a third of a pound of beef, about enough for a large hamburger. By contrast, to supply water to a quarter pound of crickets, Gracer simply places* a moist paper towel at the bottom of their tank and refreshes it weekly. Insects, he says, also need less food and space than vertebrate sources of protein and therefore could replace or supplement food resources that may become scarce in the future, such as fish stocks, which a recent study indicates may collapse by 2048.
