We as a species are beginning to realize that we need to create sustainable food sources. This means that we are going to have to rethink the 'cash crops' and foods that we currently use. The insane amount of cattle and pigs that we need to sustain us is... well insane. All those animals are creating more and more green house gases, they are taking up more and more land to raise, and they take even more food to feed.
So what is the way of dealing this with? Insects... they are one of the most available food sources in the world. They provide amazing amounts of proteins and would take up WAY less space to farm in the quantities needed sustain our population as a species.
Here is a create article on the use of Mill Worms as a 'cash crop' that we can use as a protein source.