Greenopia has an article about the best sources of protein for you. Well, if bugs are your thang.
Apparently, the 8 best bugs to eat for protein include grasshoppers, edible stinkbugs, scorpions, hornet larvae, giant silkworms, witchetty grubs, casu marzu and tarantulas.
Even if the future doesn't look like Cormac McCarthy's The Road, we should probably start thinking of eating bugs as a source of protein, since "it takes 869 gallons of water to produce a third of a pound of beef, about enough for a large hamburger. By contrast, you supply a pretty minimal amount of water to a quarter pound of crickets. The rest of the world has long eaten up insects – in Thailand, food markets are stocked with commercially-raised water beetles and bamboo worms."
So, if you feel like limiting your carbon footprint when it comes to your protein needs, sink your teeth into some insects. Roasted grasshoppers with gray sea salt and olive oil anyone? No? What about yummy fried tarantulas with a paprika aioli? Mmmm. Crunchy.