Crickets are often trumpeted as the future of food, an edible, eco-friendly solution to a some-day protein shortage that livestock just can’t fix. Even the United Nations promotes insect-eating as a promising, protein-packed way to feed the 9 billion people that will live on earth in 2050. “A benefit of insects as an alternative animal protein source is that they can be reared sustainably on organic side streams (e.g. manure, pig slurry and compost),” their report reads.
Because insects emit far fewer greenhouse gases than livestock and consume way less water, they have a comparatively tiny ecological footprint, and they’re thought to thrive on basically anything, even organic waste. That last point sums up the main ecological appeal of eating insects; growing the grain used in animal feed takes up huge water and energy resources.