Yup.  The latest weapon in the U.N.'s fight against world hunger, global warming and pollution might be buzzing around you every day.   Edible insects are being promoted as a low-fat, high protein food for people, pets and livestock.  The U.N. says the benefits include reducing greenhouse gas emissions, creating jobs in many countries and helping to feed millions of hungry people.  Currently 2 Billion people do eat insects.  Most are in Asia, Africa and Latin America.   The U.N. says the nutritional value of edible insects have found that red ants, small grasshoppers and some water beetles pack enough protein to rank them with lean ground beef while having less fat per gram.   They also say that Beetles and caterpillars are the most common meals among the more than 1,900 edible insect species.    And get this:  Some insects may already be in your food.  Demand for natural food coloring as opposed to artificial dyes in increasing.  There is a brand of strawberry yogurt that uses the coloring from an insect, and many drug companies are using coloring from insects in their pills.  Will the day come when insects are common in our everyday diets?  Something to think about.