Insects have a lot of advantages as a food source. First off, they’re nutritious. They are a great source of protein and other nutrients. Insect farming could also be drastically more efficient than raising livestock. Raising bugs requires a fraction of the space, water, food and energy that pigs or cows do. Advocates argue that the aversion to consuming bugs is largely cultural, since about 2 billion people worldwide eat them regularly. Offering insects in more appealing forms, such as bars or powders, could be a way to overcome the “ick factor.”
Source: Are insects the food of the future?