Seems the Isaan people have the right idea
Eat Bugs, Not Meat, Say 'Global Warming Researchers'by Ethan A. Huff
Researchers from Wageningen University in the Netherlands say that insects produce far less greenhouse gases than cattle and pigs do, and would thus be a viable alternative to eating meat. Published in the journal PLoS ONE, the study found that pigs, for instance, produce up to one hundred times more greenhouse gases than the equivalent weight of mealworms.
Researchers compared the greenhouse gas emissions of mealworms, crickets, locusts and pigs. Particularly with methane (CH4) and nitrous oxide (N2O), the insects produced far lower emissions than pigs did overall.
http://www.naturalnews.com/031023_global_warming_insects.html
