Mealworms make good food. Source. Credit: Ed Oudenaarden/AFP/Getty Images
This picture may look disgusting once you realize that these edible morsels are filled with mealworms, but some people actually eat things like this. A recent study has been done that shows that replacing conventional meat production with insect production (specifically mealworms, in this case) for the purpose of human consumption significantly reduces land use and carbon dioxide production. Not only that, insects are also extremely nutritious and tasty, at least that's what I've heard. It may be a long time before Americans can get over the stigma of eating bugs, but I for one would be willing to try a few grasshoppers for lunch, assuming they were prepared well.
If you want to learn more, I recommend reading this article.