I saw this TED talk a while back in which the speaker argues we should lower our meat consumption by increasing our insect consumption. He says insect meat is just as nutritious as mammal meat (if not more), and it also takes a lot fewer resources to produce it commercially.

http://www.ted.com/talks/marcel_dicke_why_not_eat_insects.ht...

I believe he said it takes 10 kg of feed and other resources to produce 1 kg of cow meat, while it takes 1 kg of inputs to produce 1 kg of grasshopper meat.

I ordered some canned mealworms off of Amazon the other day just to try them, and they actually weren't that bad with some butter and spices.